Zoom lens and image pickup apparatus

Abstract

The present application provides a zoom lens achieving wide viewing angle, miniaturization and high performance, and an imaging device provided with the zoom lens. The zoom lens of the present application is provided with a negative first lens group (G1), a positive second lens group (G2) and a subsequent lens group (GR) in this order from the object side. A focus lens group (Gf) which is more on the image side than the first lens group (G1) moves at the time of focusing. The first lens group (G1) is composed of a first a lens group (G1a) and a first b lens group (G1b) in this order from the object side. When the average of the refractive index of the negative lens of the first a lens group (G1a) is set as Nd1ave, the focal length of the focus lens group (Gf) is set as ff, and the focal length of the first lens group (G1) is set as f1, the following conditional expressions (1) and (2) are satisfied: 1.73 < Nd1ave < 1.95, (2) 1 < |ff / f1| < 3.

Description

[0001] This application is a divisional application of the invention application with the application number 201910211741.7 and the application date of March 19, 2019, and the invention name of Zoom lens and image pickup apparatus. TECHNICAL FIELD

[0002] The present application relates to a zoom lens and an image pickup apparatus. BACKGROUND

[0003] In the past, a wide-angle zoom lens has been used as an imaging lens for a digital camera or the like. As a structure of a wide-angle zoom lens, a structure in which a first lens group having a negative refractive power, a second lens group having a positive refractive power, and a subsequent lens group are disposed in order from an object side toward an image side is known. For example, in Patent Literature 1, Patent Literature 2, Patent Literature 3, and Patent Literature 4, as a lens system in which wide-angle is taken into account, a lens system identical or similar to the above-described structure is described.

[0004] Patent Literature 1: Japanese Patent Application Laid-Open No. 2016-090748

[0005] Patent Literature 2: Japanese Patent Application Laid-Open No. 2013-015621

[0006] Patent Literature 3: Japanese Patent Application Laid-Open No. 2015-203735

[0007] Patent Literature 4: Japanese Patent Application Laid-Open No. 2015-138122

[0008] In recent years, a demand for an image pickup apparatus configured to be smaller while having a wide angle of view has become stronger. In response to such a demand, miniaturization of a first lens group on the most object side, which is easily made larger in diameter, miniaturization of a lens group that moves at the time of focusing (hereinafter, referred to as a focus lens group), and miniaturization of the entire lens system including a reduction in the amount of movement of the focus lens group are required.

[0009] However, in the zoom lens described in Patent Literature 1, a low-dispersion material is used in a negative lens disposed on the object side in the first lens group. Since the refractive index of the low-dispersion material is low, the average refractive index of the first lens group becomes low, and thus it is difficult to achieve wide-angle. For example, if wide-angle is to be achieved while maintaining the condition of using the low-dispersion material described in Patent Literature 1, the absolute value of the radius of curvature of the three negative lenses disposed on the object side in the first lens group becomes small, and thus the aberration generated in the first lens group becomes large. Alternatively, the diameter of the lens constituting the first lens group becomes large.

[0010] In the zoom lens described in Patent Literature 2, a focusing lens group is disposed on the image side within the first lens group. The lens disposed within the first lens group has a large lens outer diameter and a large weight, and thus the driving actuator becomes large, and further, the entire camera becomes large. Also, in order to secure a stroke for focusing, i.e., the movement amount of the focusing lens group, the interval between the focusing lens group and the lens group disposed on the object side within the first lens group needs to be wide. However, if the interval is made wide, the outer diameter of the lens disposed on the most object side and the outer diameter of the lens disposed on the object side within the first lens group become large. Also, in the zoom lens described in Patent Literature 2, there is a problem that the refractive power of the focusing lens group is weak, and the movement amount of the focusing lens group is large.

[0011] In the zoom lens described in Patent Literature 3, a focusing lens group is disposed on the image side within the lens group disposed on the most object side and fixed at the time of zooming. In the zoom lens described in Patent Literature 3, there is a problem that the refractive power of the focusing lens group is weak, and the movement amount of the focusing lens group is large.

[0012] In the zoom lens described in Patent Literature 4, the second lens group is a focusing lens group, but there is a problem that the refractive power of the focusing lens group is weak, and the movement amount of the focusing lens group is large. SUMMARY

[0013] In view of the above, an object of the present application is to provide a zoom lens which is small in size while having a wide angle of view and high optical performance, and a camera having the zoom lens.

[0014] In order to solve the above problem, the zoom lens of the present application is composed of a first lens group having a negative refractive power, a second lens group having a positive refractive power, and a subsequent lens group, in order from the object side toward the image side, and at the time of zooming, the mutual intervals of the first lens group, the second lens group, and the subsequent lens group change as at least the first lens group and the second lens group move, and at the time of focusing from an infinite distance object to a close distance object, a focusing lens group disposed on the image side of the first lens group moves, the first lens group is composed of a first a lens group composed of three negative lenses and a first b lens group having at least one negative lens and at least one positive lens, in order from the object side toward the image side, the interval between the first a lens group and the first b lens group does not change at the time of zooming and at the time of focusing, the average of the refractive indexes of the three negative lenses of the first a lens group with respect to the d line is set as Ndlave, the focal length of the focusing lens group is set as ff, and the focal length of the first lens group is set as f1, and the following conditional expressions (1) and (2) are satisfied.

[0015] 1.73 < Ndlave < 1.95... (1)

[0016] 1 < |ff / f1| < 3... (2)

[0017] In the zoom lens of the present application, preferably the focus lens group is composed of 3 or more lenses.

[0018] In the zoom lens of the present application, βfw is set to the lateral magnification of the focus lens group in a state where the focus is on an infinite object at the wide-angle end, βrw is set to the combined lateral magnification of all lenses on the image side of the focus lens group, and when βrw is set to 1 in the case where no lens is disposed on the image side of the focus lens group, preferably the following condition (3) is satisfied.

[0019] 0.6 < | (1 - βfw 2 ) x βrw 2 | < 2.3... (3)

[0020] In the zoom lens of the present application, preferably the subsequent lens group includes a lens group that moves by changing the interval with the adjacent lens group and has a negative refractive power during zooming.

[0021] In the zoom lens of the present application, preferably the focus lens group is part of the subsequent lens group or the entire subsequent lens group. Also, preferably the focus lens group has a negative refractive power.

[0022] In the zoom lens of the present application, when Ndlamin is set to the minimum value of the refractive index of the 3 negative lenses of the 1st a lens group with respect to the d line, preferably the following condition (4) is satisfied.

[0023] 1.52 < Ndlamin < 1.89... (4)

[0024] In the zoom lens of the present application, when νdf is set to the Abbe number of at least 1 lens included in the focus lens group with respect to the d line, preferably the following condition (5) is satisfied.

[0025] 60 < νdf... (5)

[0026] In the zoom lens of the present application, when νdlbn is set to the Abbe number of at least 1 negative lens included in the 1st b lens group with respect to the d line, preferably the following condition (6) is satisfied.

[0027] 60 < νdlbn... (6)

[0028] In the zoom lens of the present application, when Ndl is set to the refractive index of the lens disposed on the most object side with respect to the d line, preferably the following condition (7) is satisfied.

[0029] 1.7 < Ndl < 2.1... (7)

[0030] In the zoom lens of the present application, when the air converted distance on the optical axis from the lens surface closest to the image side in the state where the focus is on an infinite distance object at the wide angle end to the image surface is set as BFw, the focal length of the zoom lens in the state where the focus is on an infinite distance object at the wide angle end is set as fw, and the maximum half view angle in the state where the focus is on an infinite distance object at the wide angle end is set as ωw, it is preferable to satisfy the conditional expression (8) indicated below.

[0031] 0.5 < BFw / (fw x tan ωw) < 1.5... (8)

[0032] In the zoom lens of the present application, when the maximum half view angle in the state where the focus is on an infinite distance object at the wide angle end is set as ωw, and the opening F number at the wide angle end is set as FNow, it is preferable to satisfy the conditional expression (9) indicated below.

[0033] 0.45 < tan ωw / FNow < 1... (9)

[0034] In the zoom lens of the present application, when the radius of curvature of the lens surface on the object side of the lens disposed closest to the object side is set as Rl, and the radius of curvature of the lens surface on the image side of the lens disposed closest to the object side is set as R2, it is preferable to satisfy the conditional expression (10) indicated below.

[0035] 3.3 < (Rl + R2) / (Rl - R2) < 5.5... (10)

[0036] In the zoom lens of the present application, when the focal length of the 1st lens group is set as fl, and the focal length of the 2nd lens group is set as f2, it is preferable to satisfy the conditional expression (11) indicated below.

[0037] 0.2 < |fl / f2| < 0.65... (11)

[0038] In the zoom lens of the present application, when the focal length of the 1st a lens group is set as fla, and the focal length of the 1st b lens group is set as flb, it is preferable to satisfy the conditional expression (12) indicated below.

[0039] 0.02 < |fla / flb| < 0.15... (12)

[0040] In the zoom lens of the present application, it is preferable that the subsequent lens group include a lens group whose interval from the adjacent lens group changes at the time of zooming and which has positive refractive power, on the closest image side.

[0041] In the zoom lens of the present application, it is preferable that the lens group having positive refractive power on the closest image side of the subsequent lens group be fixed with respect to the image surface at the time of zooming and at the time of focusing.

[0042] In the zoom lens of the present application, preferably, the subsequent lens groups are composed of, in order from the object side toward the image side, an intermediate lens group composed of one or two lens groups and having a positive refractive power as a whole, a focus lens group having a negative refractive power, and a lens group having a positive refractive power, and the one or two lens groups in the intermediate lens group, the focus lens group, and the lens group having a positive refractive power disposed on the most image side each change the interval with the adjacent lens group at the time of zooming.

[0043] In the zoom lens of the present application, preferably, the 1st lens group is composed of two lenses composed of, in order from the object side toward the image side, a negative lens and a positive lens.

[0044] The imaging apparatus of the present application is provided with the zoom lens of the present application.

[0045] Further, "composed of" and "composed of" in the present specification mean that, in addition to the components mentioned, optical components other than lenses such as diaphragms, filters, and cover glasses, and mechanical components such as lens flanges, barrels, imaging elements, and hand-shake correction mechanisms, etc. can be included.

[0046] Further, in the present specification, "a lens group having a positive refractive power" means that the lens group as a whole has a positive refractive power. Similarly, "a lens group having a negative refractive power" means that the lens group as a whole has a negative refractive power. The meanings of "a lens having a positive refractive power", "a positive lens", and "a positive lens" are the same. The meanings of "a lens having a negative refractive power", "a negative lens", and "a negative lens" are the same. The "lens group" is not limited to a structure composed of a plurality of lenses, and can be a structure composed of only one lens. As for the sign of the refractive power related to a lens including an aspherical surface, the shape of a lens surface, and the radius of curvature, unless otherwise specified, it is considered in the paraxial region. As for the sign of the radius of curvature, the sign of the radius of curvature of the surface of the shape with the convex surface toward the object side is positive, and the sign of the radius of curvature of the surface of the shape with the convex surface toward the image side is negative. The "focal length" used in the conditional expressions is the paraxial focal length. The values of the conditional expressions are values when the d line is the reference. The "d line", the "C line", the "F line", and the "g line" described in the present specification are bright lines, the wavelength of the d line is 587.56 nm (nanometers), the wavelength of the C line is 656.27 nm (nanometers), the wavelength of the F line is 486.13 nm (nanometers), and the wavelength of the g line is 435.84 nm (nanometers).

[0047] Effects of the Invention

[0048] According to the present application, it is possible to provide a zoom lens which is downsized while obtaining a wide angle of view and has high optical performance, and an imaging apparatus provided with the zoom lens. BRIEF DESCRIPTION OF DRAWINGS

[0049] Figure 1 is a diagram showing a cross-sectional view of a lens structure and an optical path and a moving locus of a zoom lens according to an embodiment of the present application.

[0050] Figure 2 is a diagram showing a cross-sectional view of a lens structure and a moving locus of a wide-angle end and a telephoto end of a zoom lens according to Embodiment 1 of the present application.

[0051] Figure 3 is a diagram showing a cross-sectional view of a lens structure and a moving locus of a wide-angle end and a telephoto end of a zoom lens according to Embodiment 2 of the present application.

[0052] Figure 4 is a diagram showing a cross-sectional view of a lens structure and a moving locus of a wide-angle end and a telephoto end of a zoom lens according to Embodiment 3 of the present application.

[0053] Figure 5 is a diagram showing a cross-sectional view of a lens structure and a moving locus of a wide-angle end and a telephoto end of a zoom lens according to Embodiment 4 of the present application.

[0054] Figure 6 is a diagram showing a cross-sectional view of a lens structure and a moving locus of a wide-angle end and a telephoto end of a zoom lens according to Embodiment 5 of the present application.

[0055] Figure 7 is a diagram showing a cross-sectional view of a lens structure and a moving locus of a wide-angle end and a telephoto end of a zoom lens according to Embodiment 6 of the present application.

[0056] Figure 8 is a diagram showing a cross-sectional view of a lens structure and a moving locus of a wide-angle end and a telephoto end of a zoom lens according to Embodiment 7 of the present application.

[0057] Figure 9 is a diagram showing a cross-sectional view of a lens structure and a moving locus of a wide-angle end and a telephoto end of a zoom lens according to Embodiment 8 of the present application.

[0058] Figure 10 is a diagram showing a cross-sectional view of a lens structure and a moving locus of a wide-angle end and a telephoto end of a zoom lens according to Embodiment 9 of the present application.

[0059] Figure 11 is a diagram showing a cross-sectional view of a lens structure and a moving locus of a wide-angle end and a telephoto end of a zoom lens according to Embodiment 10 of the present application.

[0060] Figure 12 is a diagram showing a cross-sectional view of a lens structure and a moving locus of a wide-angle end and a telephoto end of a zoom lens according to Embodiment 11 of the present application.

[0061] Figure 13 is a diagram showing each aberration of a zoom lens according to Embodiment 1 of the present application.

[0062] Figure 14 is each aberration diagram of the zoom lens of Embodiment 2 of the present application.

[0063] Figure 15 is each aberration diagram of the zoom lens of Embodiment 3 of the present application.

[0064] Figure 16 is each aberration diagram of the zoom lens of Embodiment 4 of the present application.

[0065] Figure 17 is each aberration diagram of the zoom lens of Embodiment 5 of the present application.

[0066] Figure 18 is each aberration diagram of the zoom lens of Embodiment 6 of the present application.

[0067] Figure 19 is each aberration diagram of the zoom lens of Embodiment 7 of the present application.

[0068] Figure 20 is each aberration diagram of the zoom lens of Embodiment 8 of the present application.

[0069] Figure 21 is each aberration diagram of the zoom lens of Embodiment 9 of the present application.

[0070] Figure 22 is each aberration diagram of the zoom lens of Embodiment 10 of the present application.

[0071] Figure 23 is each aberration diagram of the zoom lens of Embodiment 11 of the present application.

[0072] Figure 24 is a perspective view of the front side of the image pickup apparatus according to an embodiment of the present application.

[0073] Figure 25 is a perspective view of the back side of the image pickup apparatus according to an embodiment of the present application.

[0074] Explanation of symbols

[0075] 1-Zoom lens, 2-On-axis beam, 3-Brightness beam with maximum angle of view, 20-Interchangeable lens, 30-Camera, 31-Camera body, 32-Shutter button, 33-Power button, 34, 35-Operation unit, 36-Display unit, 37-Mount, G1-First lens group, G1a-First a lens group, G1b-First b lens group, G2-Second lens group, G3-Third lens group, G4-Fourth lens group, G5-Fifth lens group, G6-Sixth lens group, Gf-Focusing lens group, Gm-Intermediate lens group, GR-Subsequent lens group, L11~L15, L21~L35, L41~L44, L51~L54, L61-Lens, PP-Optical components, Sim-Image plane, St-Aperture, Z-Optical axis. Detailed Implementation

[0076] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. Figure 1 The diagram shows a cross-sectional view and optical path of the wide-angle end of a zoom lens according to an embodiment of the present invention. Figure 1 The example shown corresponds to the zoom lens of Embodiment 1 described later. Figure 1 In the diagram, the left side of the paper represents the object side, and the right side represents the image side, showing the state of focusing on an object at infinity. For the optical path, the on-axis beam 2 and the beam 3 with the maximum viewing angle are shown.

[0077] In addition, Figure 1 The illustration shows a hypothetical zoom lens used in a camera device, with an optical component PP positioned between the zoom lens and the image plane (Sim) having parallel incident and exit surfaces. The optical component PP is envisioned as various filters and / or cover glass, etc. These filters include, for example, low-pass filters, infrared cut-off filters, and filters that cut off specific wavelength regions. The optical component PP may be a non-refractive component, or its structure may be omitted.

[0078] In this embodiment, the zoom lens is composed of a first lens group G1 with negative refractive power, a second lens group G2 with positive refractive power, and a subsequent lens group GR, arranged sequentially along the optical axis Z from the object side to the image side. When zooming from the wide-angle end to the telephoto end, as at least the first lens group G1 and the second lens group G2 move, the relative spacing of the optical axis directions of the first lens group G1, the second lens group G2, and the subsequent lens group GR changes.

[0079] In addition, as an example, Figure 1 The subsequent lens group GR consists of three lens groups, which are arranged sequentially from the object side to the image side as lens group 3 G3, lens group 4 G4, and lens group 5 G5. The spacing between lens groups 3 G3, 4 G4, and 5 G5 changes during zooming. Figure 1In the example of Fig. 1, the following configuration is adopted at the time of zooming: the first lens group G1, the second lens group G2, the third lens group G3, and the fourth lens group G4 move, and the fifth lens group G5 is fixed with respect to the image plane Sim. Figure 1 In Fig. 1, the arrowheads below the lens groups that move at the time of zooming show the schematic movement trajectories of the lens groups at the time of zooming from the wide-angle end to the telephoto end, and the ground marks are shown below the fourth lens group G4.

[0080] Also, as an example, in the example of Fig. 1, the aperture stop St is disposed in the fourth lens group G4. Figure 1 In Fig. 1, the aperture stop St is disposed in the fourth lens group G4. By thus disposing the aperture stop St, it is possible to achieve both wide-angle and small-diameter of the lens system.

[0081] In the zoom lens of the present embodiment, the focus lens group Gf disposed more on the image side than the first lens group G1 moves at the time of focusing from an infinite distance object to a close distance object. Figure 1 In the example shown in Fig. 1, only the focus lens group Gf moves at the time of focusing. By focusing with the lens group disposed more on the image side than the first lens group G1, it is easy to make the focus lens group Gf small and light, and thus it is possible to achieve high-speed autofocusing.

[0082] From the above, it is preferable that the focus lens group Gf be part of the subsequent lens group GR or the entire subsequent lens group GR. As described above, in order to make the focus lens group Gf small and light so as to be able to achieve high-speed autofocusing, it is preferable that the focus lens group Gf be disposed more on the image side than the first lens group G1. With regard to the positional relationship of the focus lens group Gf and the second lens group G2, it is also possible to consider a configuration in which the focus lens group Gf becomes part of the second lens group G2 or the entire second lens group G2, but in this case, the change in the angle of view and the change in the distortion aberration that accompany the movement of the focus lens group Gf become large and are not preferable. This is because, if the change in the angle of view and the change in the distortion aberration that accompany the movement of the focus lens group Gf are large, the photographer can be bothered by these changes at the time of focus operation and wobble operation. From the above, it is preferable that the focus lens group Gf be disposed in the subsequent lens group GR.

[0083] As an example, in the example of Fig. 1, the fourth lens group G4 is the focus lens group Gf. Figure 1 In the zoom lens shown in Fig. 1, the entire fourth lens group G4 is the focus lens group Gf. Figure 1 In Fig. 1, the arrowheads below the fourth lens group G4 toward the image side direction show that the fourth lens group G4 moves toward the image side at the time of focusing from an infinite distance object to a close distance object.

[0084] It is preferable that the focus lens group Gf have a negative refractive power. As described above, in order to miniaturize the focus lens group Gf, it is preferable that the focus lens group Gf be disposed on the image side more than the first lens group Gl, that is, between the most object side surface of the second lens group G2 and the image side surface of the most image side lens group. This is because the refractive power of the combined optical system from the second lens group G2 to the most image side lens group is positive, and thus, compared to the case where a lens group having a positive refractive power obtained by dividing the refractive power of the combined optical system is provided as the focus lens group Gf, a lens group having a negative refractive power of the opposite sign is provided as the focus lens group Gf, which can increase the refractive power of the focus lens group Gf. By providing the focus lens group Gf with a strong refractive power, the amount of movement of the focus lens group Gf can be reduced, and thus, the entire lens system can be miniaturized.

[0085] It is preferable that the focus lens group Gf be composed of three or more lenses. By composing the focus lens group Gf of three or more lenses, the variation in aberration at the time of focusing can be reduced. For example, the focus lens group Gf can be composed of two positive lenses and two negative lenses. In this case, the focus lens group Gf can be composed of, in order from the object side toward the image side, a positive meniscus lens with the concave surface facing the object side, a negative lens with the concave surface facing the image side, a positive lens, and a negative lens. In this case, the three lenses on the image side can be cemented to each other. In more detail, the focus lens group Gf can be composed of, in order from the object side toward the image side, a positive meniscus lens with the concave surface facing the object side, a negative lens with the concave surface facing the image side, a positive lens, and a negative lens. Alternatively, the focus lens group Gf can be composed of two positive lenses and one negative lens. In this case, the focus lens group Gf can be composed of, in order from the object side toward the image side, a positive lens, a negative lens, and a positive lens. In this case, the two lenses on the image side can be cemented to each other.

[0086] The first lens group Gl is composed of, in order from the object side toward the image side, a first a lens group Gla and a first b lens group G1b. The interval of the first a lens group Gla and the first b lens group G1b in the optical axis direction is constant at the time of zooming and at the time of focusing. If the interval of the two lens groups within the first lens group Gl is not constant, an actuator for driving at least one lens group and a wide interval for moving at least one lens group are required. Therefore, by making the interval of the first a lens group Gla and the first b lens group G1b constant at the time of zooming and at the time of focusing, miniaturization is facilitated.

[0087] The 1st a lens group G1a is composed of 3 negative lenses. By configuring the 1st a lens group G1a disposed on the object side in the 1st lens group G1 with only negative lenses, it becomes easy to prevent the enlargement of the lens diameter of the 1st lens group G1 even in the case of wide-angle. Also, by using 3 negative lenses in the 1st a lens group G1a, it is possible to correct the off-axis aberration well. As an example, the 1st a lens group G1a can be configured to be composed of 3 negative meniscus lenses with the convex surface toward the object side, in which case, it is advantageous to achieve wide-angle while correcting the off-axis aberration.

[0088] The 1st b lens group G1b has at least 1 negative lens and at least 1 positive lens. In a zoom lens having the 1st lens group G1 having negative power and the 2nd lens group G2 having positive power as in the present embodiment, the height of the on-axis ray passing through the 1st lens group G1 is low on the wide-angle side, and the higher the on-axis ray height becomes, the more the telephoto side, so the variation of the chromatic aberration with magnification change easily becomes large. Therefore, in the 1st lens group G1, the 1st b lens group G1b having at least 1 negative lens and at least 1 positive lens and having an achromatic effect is disposed on the image side where the on-axis ray height becomes higher. With this structure, it is possible to reduce the variation of the on-axis chromatic aberration with magnification change.

[0089] More specifically, it is preferable that the 1st b lens group G1b be composed of 2 lenses composed of a negative lens and a positive lens in order from the object side toward the image side. In this case, it is possible to concentrate the negative power in the 1st lens group G1 on the side of the lens disposed closest to the object side, reducing the diameter of the lens. Also, by configuring the 1st b lens group G1b to be composed of only 2 lenses, it is possible to achieve miniaturization and weight reduction. As an example, the 1st b lens group G1b can be configured to be composed of a double-concave lens and a positive lens with the convex surface toward the object side. The negative lens and the positive lens included in the 1st b lens group G1b can be cemented or not.

[0090] When the average value of the refractive index of the 3 negative lenses of the 1st lens group Gla with respect to the d-line is set to Ndlave, the zoom lens of the present embodiment satisfies the following conditional expression (1). Conditional expression (1) prescribes the average refractive index of the 3 lenses disposed in the 1st lens group Gla. By being set to not become lower than the lower limit of conditional expression (1), even if wide-angle is realized, the absolute value of the radius of curvature of the negative lens disposed in the 1st lens group Gla does not become too small, so the increase in the axial chromatic aberration can be suppressed. Or, by being set to not become lower than the lower limit of conditional expression (1), even if wide-angle is realized, the large diameter of the lens of the 1st lens group G1a can be suppressed. By being set to not become higher than the upper limit of conditional expression (1), the dispersion of the negative lens of the 1st lens group G1a can be suppressed from becoming too large, and this is particularly advantageous for correcting the lateral chromatic aberration on the wide-angle side. Further, if the structure is set so as to satisfy the following conditional expression (1-1), even better characteristics can be obtained, and if the structure is set so as to satisfy the following conditional expression (1-2), even better characteristics can be obtained.

[0091] 1.73 < Ndlave < 1.95... (1)

[0092] 1.75 < Ndlave < 1.93... (1-1)

[0093] 1.77 < Ndlave < 1.91... (1-2)

[0094] And, when the focal length of the focus lens group Gf is set to ff, and the focal length of the 1st lens group G1 is set to f1, the zoom lens of the present embodiment satisfies the following conditional expression (2). Conditional expression (2) prescribes the relationship between the focal length of the focus lens group Gf and the focal length of the 1st lens group G1. By being set to not become lower than the lower limit of conditional expression (2), the refractive power of the 1st lens group G1 does not become too weak, so this is advantageous for suppressing the large diameter of the lens of the 1st lens group G1, or for reducing the amount of movement of the 1st lens group G1 accompanying zooming. Or, by being set to not become lower than the lower limit of conditional expression (2), the refractive power of the focus lens group Gf does not become too strong, so the increase in the curvature of field can be suppressed, or the variation in the curvature of field accompanying the movement of the focus lens group Gf can be suppressed. By being set to not become higher than the upper limit of conditional expression (2), the refractive power of the 1st lens group G1 does not become too strong, so correcting the distortion aberration and the astigmatism becomes easy. Or, by being set to not become higher than the upper limit of conditional expression (2), the refractive power of the focus lens group Gf does not become too weak, so the amount of movement of the focus lens group Gf at the time of focusing can be reduced. Further, if the structure is set so as to satisfy the following conditional expression (2-1), even better characteristics can be obtained, and if the structure is set so as to satisfy the following conditional expression (2-2), even better characteristics can be obtained.

[0095] 1 < |ff / f1| < 3... (2)

[0096] 1.1 < |ff / f1| < 2.9... (2-1)

[0097] 1.2 < |ff / f1| < 2.3... (2-2)

[0098] Further, it is preferable that the zoom lens of the present embodiment satisfy the following conditional expression. βfw is the lateral magnification of the focus lens group Gf in a state where an object at infinity at the wide-angle end is focused, βrw is the combined lateral magnification of all lenses on the image side than the focus lens group Gf in a state where an object at infinity at the wide-angle end is focused, and when βrw is set to 1 in the case where no lens is disposed on the image side than the focus lens group Gf, it is preferable to satisfy the following conditional expression (3). Conditional expression (3) specifies the amount of focus shift with respect to the amount of movement of the focus lens group Gf. By being set to not be lower than the lower limit of conditional expression (3), it is possible to reduce the amount of movement of the focus lens group Gf at the time of focusing, and thus it is advantageous in shortening the total lens system length. Alternatively, by being set to not be lower than the lower limit of conditional expression (3), it is possible to shorten the minimum photographing distance. By being set to not be higher than the upper limit of conditional expression (3), the refractive power of the focus lens group Gf does not become excessively strong, and thus it is possible to suppress each aberration generated in the focus lens group Gf. Further, if it is set to a structure that satisfies the following conditional expression (3-1), it is possible to become a more favorable characteristic, and if it is set to a structure that satisfies the following conditional expression (3-2), it is possible to further become a more favorable characteristic.

[0099] 0.6 < | (1 - βfw 2 ) x βrw 2 | < 2.3... (3)

[0100] 0.8 < | (1 - βfw 2 ) x βrw 2 | < 2.1... (3-1)

[0101] 1.1 < | (1 - βfw 2 ) x βrw 2 | < 1.9... (3-2)

[0102] When the minimum value of the refractive index of the three negative lenses of the first lens group Gla with respect to the d-line is set to Ndlamin, it is preferable to satisfy the following conditional expression (4). Conditional expression (4) specifies the minimum refractive index of the negative lens disposed in the first lens group Gla. In order to correct the lateral chromatic aberration at the wide angle side, it is also possible to consider using a material having a small Abbe number in the negative lens disposed in the first lens group Gla, but the refractive index of such a material is low. If the lens is configured with a material having a low refractive index, the absolute value of the curvature radius becomes small, which can cause an adverse situation in which the off-axis aberration increases and / or the lens diameter becomes large. By being set to be not lower than the lower limit of conditional expression (4), such an adverse situation can be avoided. By being set to be not higher than the upper limit of conditional expression (4), the Abbe number of the negative lens of the first lens group Gla does not become too large, and thus correction of the lateral chromatic aberration at the wide angle end becomes easy, in particular. In addition, if the structure is set to satisfy the following conditional expression (4-1), it is possible to achieve even better characteristics, and if the structure is set to satisfy the following conditional expression (4-2), it is possible to achieve even better characteristics.

[0103] 1.52 < Ndlamin < 1.89... (4)

[0104] 1.56 < Ndlamin < 1.86... (4-1)

[0105] When the Abbe number of at least one lens included in the focus lens group Gf is set to νdf, it is preferable to satisfy the following conditional expression (5). That is, it is preferable that the focus lens group Gf have at least one lens that satisfies conditional expression (5). Conditional expression (5) specifies the Abbe number of at least one lens disposed in the focus lens group Gf. By being set to be not lower than the lower limit of conditional expression (5), it is possible to suppress variation in the chromatic aberration at the time of focusing. Furthermore, it is preferable to satisfy the following conditional expression (5-1). By being set to be not lower than the lower limit of conditional expression (5-1), it is possible to improve the effect related to conditional expression (5). By being set to be not higher than the upper limit of conditional expression (5-1), it is possible to secure the required refractive index, and thus it is possible to correct the spherical aberration and the coma well. In addition, if the structure is set to satisfy the following conditional expression (5-2), it is possible to achieve even better characteristics.

[0106] 60 < νdf... (5)

[0107] 64 < νdf < 98... (5-1)

[0108] 68 < νdf < 85... (5-2)

[0109] When a d-line reference Abbe number of at least one negative lens included in the first b-lens group G1b is νd1bn, it is preferable to satisfy the following conditional expression (6). That is, it is preferable that the first b-lens group G1b have at least one negative lens satisfying the conditional expression (6). The conditional expression (6) specifies an Abbe number of at least one negative lens disposed in the first b-lens group G1b. By being set to be not less than a lower limit of the conditional expression (6), it is possible to suppress variation in on-axis chromatic aberration at the time of zooming. Alternatively, by being set to be not less than a lower limit of the conditional expression (6), it is possible to well correct the lateral chromatic aberration on the wide angle side. Further, it is preferable to satisfy the following conditional expression (6-1). By being set to be not less than a lower limit of the conditional expression (6-1), it is possible to improve the effect related to the conditional expression (6). By being set to be not more than an upper limit of the conditional expression (6-1), it is possible to secure a required refractive index, and thus it is possible to well correct each aberration such as spherical aberration. In addition, if the structure satisfying the following conditional expression (6-2) is provided, it is possible to have a more favorable characteristic.

[0110] 60 < νd1bn < 100 …… (6-1)

[0111] 66 < νd1bn < 100 …… (6-1)

[0112] 68 < νd1bn < 98 …… (6-2)

[0113] When a refractive index with respect to the d-line of a lens disposed closest to the object side is Ndl, it is preferable to satisfy the following conditional expression (7). The conditional expression (7) specifies a refractive index of a material used for the lens closest to the object side. By being set to be not less than a lower limit of the conditional expression (7), it is easy to realize the miniaturization of the lens closest to the object side, and further to realize the miniaturization of the entire first lens group G1. By being set to be not more than an upper limit of the conditional expression (7), it is easy to correct the curvature of field. Alternatively, by being set to be not more than an upper limit of the conditional expression (7), it is easy to constitute the lens closest to the object side without using a material having a large dispersion, and thus it is easy to well correct the lateral chromatic aberration.

[0114] 1.7 < Ndl < 2.1 …… (7)

[0115] When an air conversion distance on the optical axis from a lens surface closest to the image side in a state where an infinite object at the wide angle end is focused to an image surface Sim is BFw, a focal length of the zoom lens in a state where the infinite object at the wide angle end is focused is fw, and a maximum half view angle in a state where the infinite object at the wide angle end is focused is ωw, it is preferable to satisfy the following conditional expression (8). Figure 1 In the example shown, ωw corresponds to an angle formed by the optical axis Z and a chief ray of the maximum view angle, which is closer to the object side than the lens closest to the object side. Figure 1In the above-described lens barrel, the chief ray of the maximum angle of view is shown by a single-dot line within the light flux 3 of the maximum angle of view. The conditional expression (8) prescribes the relationship of the air conversion distance from the most image side lens surface at the wide angle end to the image surface Sim, the so-called back focus, the focal length at the wide angle end, and the half angle of view at the wide angle end. By being set to not become lower than the lower limit of the conditional expression (8), it becomes easy to secure the back focus required in a lens interchangeable camera or the like. Also, by being set to not become lower than the lower limit of the conditional expression (8), it becomes easy to secure the refractive power of the first lens group Gl or to reduce the interval of the first lens group Gl and the second lens group G2 at the wide angle end. Thus, it becomes easy to achieve the miniaturization of the first lens group Gl. By being set to not become higher than the upper limit of the conditional expression (8), the back focus does not become excessively long, so it becomes easy to set the number of lenses required to secure good optical performance with respect to the total optical length, taking a wide range in which the lens can be disposed. Also, if the back focus is long, the refractive power of the first lens group Gl needs to be strengthened in order to secure the long back focus, but by being set to not become higher than the upper limit of the conditional expression (8), the back focus does not become excessively long, so there is no need to strengthen the refractive power of the first lens group Gl, as a result of which it becomes easy to correct the image drift on the telephoto side in particular. Further, if the structure is set to satisfy the following conditional expression (8-1), it becomes even better in performance.

[0116] 0.5 < BFw / (fw x tan ωw) < 1.5... (8)

[0117] 0.6 < BFw / (fw x tan ωw) < 1.3... (8-1)

[0118] When the maximum half angle of view in a state in which the focus is on an infinite object at the wide angle end is set to ωw, and the open F number at the wide angle end is set to FNow, it is preferable to satisfy the following conditional expression (9). The conditional expression (9) prescribes the relationship of the maximum half angle of view at the wide angle end and the open F number. By being set to not become lower than the lower limit of the conditional expression (9), it becomes possible to widen the angle of view at the wide angle end or to reduce the open F number, so it becomes possible to correspond to a wide range of uses, thereby becoming a high-value wide zoom lens. By being set to not become higher than the upper limit of the conditional expression (9), it becomes easy to obtain good optical performance while suppressing the increase in the number of lens pieces and suppressing the large size of the lens system. Further, if the structure is set to satisfy the following conditional expression (9-1), it becomes even better in performance.

[0119] 0.45 < tan ωw / FNow < 1... (9)

[0120] 0.46 < tan ωw / FNow < 0.8... (9-1)

[0121] When the radius of curvature of the object side lens surface of the lens disposed closest to the object side is set to Rl, and the radius of curvature of the image side lens surface of the lens disposed closest to the object side is set to R2, it is preferable to satisfy the following conditional expression (10). Conditional expression (10) specifies the relationship between the radius of curvature of the object side surface and the radius of curvature of the image side surface of the lens disposed closest to the object side, or the so-called shape factor of the lens. By being set to not become lower than the lower limit of conditional expression (10), it becomes easy to correct the longitudinal chromatic aberration, in particular. By being set to not become higher than the upper limit of conditional expression (10), it becomes easy to correct the spherical aberration on the telephoto side well. Also, by being set to not become higher than the upper limit of conditional expression (10), the refractive power of the lens disposed closest to the object side does not become too weak, so it becomes easy to achieve wide-angle. In addition, if it is structured so as to satisfy the following conditional expression (10-1), it is possible to achieve even better characteristics.

[0122] 3.3 < (Rl + R2) / (Rl - R2) < 5.5... (10)

[0123] 3.3 < (Rl + R2) / (Rl - R2) < 5... (10-1)

[0124] When the focal length of the first lens group Gl is set to fl, and the focal length of the second lens group G2 is set to f2, it is preferable to satisfy the following conditional expression (11). Conditional expression (11) specifies the relationship between the focal lengths of the first lens group Gl and the second lens group G2. By being set to not become lower than the lower limit of conditional expression (11), the refractive power of the first lens group Gl does not become too strong, so it becomes easy to correct the distortion aberration and the chromatic aberration. Or, by being set to not become lower than the lower limit of conditional expression (11), the refractive power of the second lens group G2 does not become too weak, so it becomes easy to correct the spherical aberration on the telephoto side, in particular. By being set to not become higher than the upper limit of conditional expression (11), the refractive power of the first lens group Gl does not become too weak, so it is possible to suppress the increase in the diameter of the first lens group Gl, or to suppress the movement amount of the first lens group Gl at the time of zooming. Or, by being set to not become higher than the upper limit of conditional expression (11), the refractive power of the second lens group G2 does not become too strong, so it becomes easy to correct the curvature of field on the wide-angle side, in particular. In addition, if it is structured so as to satisfy the following conditional expression (11-1), it is possible to achieve even better characteristics.

[0125] 0.2 < |fl / f2| < 0.65... (11)

[0126] 0.25 < |fl / f2| < 0.63... (11-1)

[0127] When the focal length of the first la lens group Gla is set to fia and the focal length of the first lb lens group Glb is set to flb, it is preferable to satisfy the following conditional expression (12). Conditional expression (12) specifies the relationship between the focal length of the first la lens group Gla and the focal length of the first lb lens group Glb. By being set to not become lower than the lower limit of conditional expression (12), the refractive power of the first lb lens group Glb does not become too weak, and thus correction of distortion aberration becomes easy. By being set to not become higher than the upper limit of conditional expression (12), the refractive power of the first lb lens group Glb does not become too strong, and thus it becomes easy to reduce the diameter of the lens disposed on the most object side. In addition, if the structure satisfying the following conditional expression (12-1) is set, it is possible to become a more favorable characteristic, and if the structure satisfying the following conditional expression (12-2) is set, it is possible to further become a more favorable characteristic.

[0128] 0.02 < |fia / flb| < 0.15... (12)

[0129] 0.03 < |fia / flb| < 0.12... (12-1)

[0130] 0.04 < |fia / flb| < 0.1... (12-2)

[0131] Next, the subsequent lens group GR is described. It is preferable that the subsequent lens group GR include a lens group that moves by changing the interval from the adjacent lens group at the time of zooming and has a negative refractive power. The second lens group G2 is disposed adjacent to the subsequent lens group GR, and by disposing a lens group having a refractive power of the opposite sign to the refractive power of the second lens group G2 in the subsequent lens group, it is possible to improve the zoom effect. Also, by providing a lens group having a negative refractive power on the object side and the image side of the second lens group G2, it is advantageous to correct the off-axis aberration.

[0132] It is preferable that the subsequent lens group GR include a lens group having a positive refractive power on the most image side that changes the interval from the adjacent lens group at the time of zooming. In a wide-angle zoom lens, in particular, at the wide-angle end, the incident angle of the chief ray of the maximum angle of view toward the image plane Sim easily becomes large. By disposing a lens group having a positive refractive power on the most image side, it becomes easy to reduce the incident angle of the chief ray of the maximum angle of view toward the image plane Sim.

[0133] In the case where the subsequent lens group GR includes the above-described lens group having a positive refractive power on the most image side, it is preferable that the lens group having a positive refractive power on the most image side be fixed with respect to the image plane Sim at the time of zooming and focusing. By fixing the lens group on the most image side, it is possible to reduce the intrusion of dirt into the zoom lens.

[0134] Further, it is preferable that the above-mentioned lens group having positive refractive power closest to the image side within the subsequent lens group GR is fixed with respect to the image plane Sim at the time of zooming and focusing and is composed of one lens. Since the diameter of the light flux passing through the lens group closest to the image side becomes small, the burden of aberration correction of this lens group is not large, and therefore it is preferable to be composed of a small number of lens pieces. By composing the lens group closest to the image side with only one lens, miniaturization is facilitated.

[0135] It is preferable that the subsequent lens group GR is sequentially composed of, from the object side toward the image side, an intermediate lens group Gm composed of one or two lens groups and having positive refractive power as a whole, a focus lens group Gf having negative refractive power, and a lens group having positive refractive power. Figure 1 In the example shown, the third lens group G3 corresponds to the intermediate lens group Gm. The one or two lens groups within the intermediate lens group Gm, the focus lens group Gf, and the lens group having positive refractive power closest to the image side are each a lens group whose interval from an adjacent lens group changes at the time of zooming. That is, it is preferable that the zoom lens of the present embodiment is sequentially composed of, from the object side toward the image side, the first lens group G1 having negative refractive power, the second lens group G2 having positive refractive power, the above-mentioned intermediate lens group Gm, the focus lens group Gf having negative refractive power, and the lens group having positive refractive power. By providing the zoom lens having five to six lens groups whose intervals from each other change at the time of zooming, the generation of decentration coma aberration accompanying manufacturing errors is suppressed, thereby suppressing an increase in manufacturing difficulty, and it is possible to correct aberration, particularly image surface curvature, well over the entire zoom range.

[0136] Further, Figure 1 In the example of FIG. 1, the number of lens groups constituting the subsequent lens group GR is three, and the intervals between the lens groups change at the time of zooming. However, in the technology of the present disclosure, the number of lens groups constituting the subsequent lens group GR can also be set to another number, and therefore, taking into account both miniaturization and high performance, the number can be set to one or more and four or less, for example.

[0137] Further, in Figure 1 In the example of FIG. 1, the number of lens groups constituting the subsequent lens group GR is three, and the intervals between the lens groups change at the time of zooming. However, in the technology of the present disclosure, the number of lens groups constituting the subsequent lens group GR can also be set to another number, and therefore, taking into account both miniaturization and high performance, the number can be set to one or more and four or less, for example.

[0138] The above-mentioned preferred structures and possible structures can be combined in any manner, and are preferably selectively adopted as appropriate in accordance with the required specifications. According to the present embodiment, a zoom lens that achieves both a wide angle of view and miniaturization, and that has high optical performance, can be realized. In addition, the "wide angle of view" referred to herein means that the maximum total angle of view at the wide-angle end is greater than 120 degrees.

[0139] Next, numerical examples of the zoom lens of the present application will be described.

[0140] [Example 1]

[0141] The sectional view and the schematic movement trajectory of the zoom lens of Example 1 are shown in FIG. 1. In addition, in FIG. 1, the left side of the paper is the object side, and the right side of the paper is the image side, and a state in which an object at infinity is focused on is shown. Figure 2 In FIG. 1, the upper section labeled "wide-angle end" shows the wide-angle end state, and the lower section labeled "telephoto end" shows the telephoto end state. In Figure 2 In FIG. 1, between the upper section and the lower section, with respect to each lens group that moves during zooming, a schematic movement trajectory of each lens group during zooming from the wide-angle end to the telephoto end is shown by an arrow, and with respect to the lens group that is fixed with respect to the image plane Sim during zooming, a ground mark is shown. Figure 2 Figure 2 The zoom lens of Example 1 is composed of, in order from the object side toward the image side, a first lens group G1 having negative refractive power, a second lens group G2 having positive refractive power, a third lens group G3 having positive refractive power, a fourth lens group G4 having negative refractive power, and a fifth lens group G5 having positive refractive power. During zooming from the wide-angle end to the telephoto end, the first lens group G1 moves toward the image side, the second lens group G2, the third lens group G3, and the fourth lens group G4 move toward the object side, the fifth lens group G5 is fixed with respect to the image plane Sim, and all of the intervals of the adjacent lens groups change. The first lens group G1 is composed of, in order from the object side toward the image side, five lenses L11 to L15, the second lens group G2 is composed of, in order from the object side toward the image side, an aperture stop St and five lenses L21 to L25, the third lens group G3 is composed of, in order from the object side toward the image side, five lenses L31 to L35, the fourth lens group G4 is composed of, in order from the object side toward the image side, four lenses L41 to L44, and the fifth lens group G5 is composed of one lens L51. The focus lens group Gf is the fourth lens group G4 as a whole.

[0142] In FIG. 1, similarly to FIG. 1, an arrow toward the image side direction is shown below the lens group corresponding to the focus lens group Gf. The above is the schematic structure of the zoom lens of Example 1. Figure 2 Figure 1 In FIG. 1, similarly to FIG. 1, an arrow toward the image side direction is shown below the lens group corresponding to the focus lens group Gf. The above is the schematic structure of the zoom lens of Example 1.

[0143] ​​The basic lens data of the zoom lens of Example 1 is shown in Table 1, the specifications and variable face intervals are shown in Table 2, and the aspheric coefficients are shown in Table 3. In Table 1, the face numbers are shown in the Sn column when the face closest to the object side is set as the 1st face and the numbering is increased one by one toward the image side, the radii of curvature of the faces are shown in the R column, and the face intervals on the optical axis of each face from the face adjacent on the image side are shown in the D column. Also, the refractive indices of each component with respect to the d line are shown in the Nd column, the Abbe number of the d line reference of each component is shown in the vd column, and the partial dispersion ratio between the g line and the F line of each component is shown in the θgF column. In addition, the partial dispersion ratio θgF between the g line and the F line of a certain lens is a value defined by θgF = (Ng - NF) / (NF - NC) when the refractive indices of this lens with respect to the g line, the F line, and the C line are set as Ng, NF, and NC, respectively.

[0144] In Table 1, the sign of the radius of curvature of a face of convex shape toward the object side is set as positive, and the sign of the radius of curvature of a face of convex shape toward the image side is set as negative. The aperture stop St and the optical components PP are also shown in Table 1. In Table 1, the term "St" is written in the face number column of the face corresponding to the aperture stop St. The value of the lowermost column of D in Table 1 is the interval between the face closest to the image side in the table and the image plane Sim. In Table 1, regarding the variable face interval, the notation DD[] is used, and the object side face number of the interval is noted in the [] and written in the D column.

[0145] In Table 2, the values of the zoom ratio Zr, the focal length f of the entire system, the F number FNo., the maximum total angle of view 2ω, and the variable face interval are shown on the d line reference. The (°) of the 2ω column indicates the unit in degrees. In Table 2, the values of the state of focusing on an infinite object at the wide-angle end, the state of focusing on an infinite object at the telephoto end, the state of focusing on an object at a distance of 500 mm from the image plane at the wide-angle end, and the state of focusing on an object at a distance of 500 mm from the image plane at the telephoto end are shown in the columns labeled W-Infinity, T-Infinity, w-500 mm, and T-500 mm, respectively. In addition, the f of the column of w-Infinity corresponds to fw used in the above conditional expression.

[0146] In Table 1, the face numbers of the aspheres are marked with * marks, and the numerical values of the on-axis radii of curvature are written in the radius of curvature column of the aspheres. In Table 3, the face numbers of the aspheres are shown in the Sn column, and the numerical values of the aspheric coefficients for each asphere are shown in the KA and Am (m = 3, 4, 5,...) columns. "E±n" (n: integer) of the numerical values of the aspheric coefficients in Table 3 indicates "x 10 ±n ". KA and Am are the aspheric coefficients in the aspheric expression represented by the following formula.

[0147] Zd = C x h 2 / {1 + (1 - KA x C 2 x h 2 ) 1 / 2} + ∑Am x h m

[0148] wherein,

[0149] Zd: aspherical depth (length of a perpendicular from a point on the aspherical surface at height h to a plane perpendicular to the optical axis tangent to the aspherical vertex);

[0150] h: height (distance from the optical axis to the lens surface);

[0151] C: reciprocal of the paraxial curvature radius;

[0152] KA, Am: aspherical coefficients,

[0153] ∑ of the aspherical formula indicates summation with respect to m.

[0154] In the data of each table, degrees are used as the unit of angle and mm (millimeters) are used as the unit of length, but the optical system can be used even if the scale is enlarged or reduced, and thus other appropriate units can be used. Also, in each table shown below, values rounded to a prescribed number of digits are described.

[0155] [Table 1]

[0156] Example 1

[0157] Sn R D Nd νd θgF 1 41.94034 2.100 1.85150 40.78 0.56958 2 24.28157 6.178 *3 75.00000 2.500 1.69259 53.07 0.54955 *4 18.47265 7.784 *5 36.29274 2.100 1.85108 40.12 0.56852 *6 17.10000 8.354 7 -46.41263 1.120 1.43875 94.66 0.53402 8 26.32000 5.100 1.95375 32.32 0.59015 9 366.77570 DD[9] 10 (St) ∞ 1.311 *11 26.26117 4.880 1.69350 53.18 0.54831 *12 -35.28129 0.203 13 -57.42580 0.820 1.75500 52.32 0.54737 14 19.66700 2.800 1.59522 67.73 0.54426 15 137.14630 1.893 16 -277.24752 0.790 1.81600 46.62 0.55682 17 29.77900 2.800 1.64769 33.79 0.59393 18 -67.77760 DD

[18] 19 -155.86052 0.810 1.81600 46.62 0.55682 20 20.41300 4.360 1.59282 68.62 0.54414 21 -35.61991 2.100 22 42.02719 1.010 1.85150 40.78 0.56958 23 18.24500 4.990 1.43875 94.66 0.53402 24 -56.85949 0.150 25 25.78476 5.800 1.43875 94.66 0.53402 26 -25.78476 DD

[26] *27 -64.12560 2.690 1.85343 40.56 0.56684 *28 -21.45850 0.100 29 ∞ 0.890 1.88300 40.76 0.56679 30 12.20900 5.680 1.49700 81.54 0.53748 31 -177.03000 0.810 1.88300 39.22 0.57295 32 27.74373 DD

[32] 33 155.15267 2.500 1.94595 17.98 0.65460 34 -99.58637 8.949 35 ∞ 2.850 1.51680 64.20 0.53430 36 ∞ 1.000

[0158] [Table 2]

[0159] Example 1

[0160] W-Infinity T-Infinity W-500mm T-500mm Zr 1.000 1.883 - - f 8.238 15.516 8.195 15.327 FNo. 2.88 2.88 2.85 2.87 2ω(°) 125.8 82.4 126.0 82.8 DD[9] 29.531 2.986 29.531 2.986 DD

[18] 3.357 2.809 3.357 2.809 DD

[26] 2.100 6.601 2.222 6.900 DD

[32] 3.447 9.257 3.325 8.958

[0161] [Table 3]

[0162] Example 1

[0163] Sn 3 4 5 6 KA 1.0000000E+00 1.0000000E+00 1.0000000E+00 1.0000000E+00 A3 0.0000000E+00 0.0000000E+00 0.0000000E+00 0.0000000E+00 A4 1.8160996E-04 1.8468610E-04 -3.5121597E-05 -5.1194646E-05 A5 -1.1335952E-05 -1.2145091E-05 -1.7847803E-05 -1.8058170E-05 A6 -1.4335425E-06 -1.2166255E-06 2.3507898E-06 3.5437269E-06 A7 1.6657704E-07 7.3739848E-09 2.6791047E-07 1.0407126E-07 A8 3.7176528E-09 1.1634818E-08 -4.7251861E-08 -6.5002915E-08 A9 -1.1789882E 09 1.7527294E-09 -2.3578362E-09 1.5980818E 09 A10 1.6846045E-11 -2.3439242E-10 5.0985133E-10 9.6469129E-10 A11 4.9683664E-12 -2.0890135E-11 1.3769111E-11 -1.1394206E-10 A12 -1.6509787E-13 2.6854226E-12 -3.4119027E-12 -3.5085860E-12 A13 -1.2889391E-14 1.1950808E-13 -5.0951086E-14 1.5437474E-12 A14 5.7379998E-16 -1.6261627E-14 1.4344945E-14 -4.8263251E-14 A15 2.0021309E-17 -3.8891310E-16 1.0991901E-16 -8.5442321E-15 A16 -1.0471255E-18 5.3876680E-17 -3.6564916E-17 4.8212604E-16 A17 -1.6950892E-20 6.9841033E-19 -1.2242734E-19 2.0638114E-17 A18 1.0001019E-21 -9.2860078E-20 5.1534781E-20 -1.5464338E-18 A19 5.9701858E-24 -5.4301162E-22 5.2084646E-23 -1.7486813E-20 A20 -3.9636710E-25 6.5318111E-23 -3.0822936E-23 1.6996115E-21

[0164] Sn 11 12 27 28 KA 1.0000000E+00 1.0000000E+00 1.0000000E+00 1.0000000E+00 A3 0.0000000E+00 0.0000000E+00 0.0000000E+00 0.0000000E+00 A4 3.4130173E-05 6.2420625E-05 -6.0807770E-05 2.9716437E-05 A5 -2.6217914E-05 -2.1062733E-05 3.6227550E-05 7.6242490E-07 A6 9.8676344E-06 8.4905269E-06 -2.5310378E-05 -1.7092045E-06 A7 -4.8898264E-07 -1.1036213E-06 9.4296047E-06 4.5860772E-07 A8 -7.2967595E-07 -2.5485692E-07 -1.6820493E-06 1.4557727E-08 A9 1.9381422E-07 1.1852547E-07 -6.1219487E-10 -2.5304394E-08 A10 1.5648615E-09 -1.3534098E-08 5.3585618E-08 1.6289649E-09 A11 -6.6656712E-09 -1.6863962E-09 -7.2268338E-09 6.6338124E-10 A12 4.6499647E-10 6.5309998E-10 -2.3410749E-10 -6.7515269E-11 A13 1.2073678E-10 -4.1165896E-11 1.2768330E-10 -9.9334783E-12 A14 -1.2738591E-11 -9.2191136E-12 -6.9388519E-12 1.2373518E-12 A15 -1.4421479E-12 1.4785823E-12 -6.7668240E-13 8.6500487E-14 A16 1.7978446E-13 2.0460884E-14 8.4897976E-14 -1.2293866E-14 A17 1.0435769E-14 -1.6419747E-14 -9.8085392E-16 -4.0666189E-16 A18 -1.3885918E-15 6.1368314E-16 -2.5071105E-16 6.4330812E-17 A19 -3.2975909E-17 6.4961582E-17 1.3030111E-17 7.9572817E-19 A20 4.4854674E-18 -4.1335786E-18 -1.9352472E-19 -1.3910445E-19

[0165] In Figure 13 each aberration diagram of the zoom lens of Example 1 is shown. In Figure 13 , from the left, a spherical aberration, an astigmatism, a distortion aberration, and a magnification chromatic aberration are shown in order. Figure 13In the figure, the aberration graph in the state of focusing on an infinite distant object at the wide-angle end is shown in the 1st segment labeled "wide-angle end, infinite distant object", the aberration graph in the state of focusing on an infinite distant object at the telephoto end is shown in the 2nd segment labeled "telephoto end, infinite distant object", the aberration graph in the state of focusing on an object at a distance of 500 mm (millimeters) from the image plane Sim at the wide-angle end is shown in the 3rd segment labeled "wide-angle end, close-range object (500 mm from image plane)", and the aberration graph in the state of focusing on an object at a distance of 500 mm (millimeters) from the image plane Sim at the telephoto end is shown in the 4th segment labeled "telephoto end, close-range object (500 mm from image plane)".

[0166] In Figure 13 In the spherical aberration graph, the aberration under the d line, the C line, the F line, and the g line is indicated by a solid line, a long dashed line, a short dashed line, and a double dashed line, respectively. In the astigmatism graph, the aberration under the d line in the sagittal direction is indicated by a solid line, and the aberration under the d line in the tangential direction is indicated by a short dashed line. In the distortion aberration graph, the aberration under the d line is indicated by a solid line. In the lateral chromatic aberration graph, the aberration under the C line, the F line, and the g line is indicated by a long dashed line, a short dashed line, and a double dashed line, respectively. The FNo. of the spherical aberration graph indicates the F value, and ω of the other aberration graphs indicates the half viewing angle.

[0167] Regarding the notation, meaning, method of recording, and method of illustrating each data related to the above-described Embodiment 1, the same as in the following embodiments is assumed unless otherwise specified, and thus repeated description is omitted below.

[0168] [Embodiment 2]

[0169] A sectional view and a schematic movement trajectory of the zoom lens of Embodiment 2 are shown in Figure 3 In Embodiment 2, the zoom lens is composed of, in order from the object side toward the image side, the 1st lens group Gl having a negative refractive power, the 2nd lens group G2 having a positive refractive power, the 3rd lens group G3 having a negative refractive power, and the 4th lens group G4 having a positive refractive power. When zooming from the wide-angle end to the telephoto end, the 1st lens group Gl moves toward the image side, the 2nd lens group G2 and the 3rd lens group G3 move toward the object side, and the 4th lens group G4 is fixed with respect to the image plane Sim, and all the intervals of the adjacent lens groups change. The 1st lens group Gl is composed of, in order from the object side toward the image side, five lenses L11 to L15, the 2nd lens group G2 is composed of, in order from the object side toward the image side, an aperture stop St and ten lenses L21 to L30, the 3rd lens group G3 is composed of, in order from the object side toward the image side, four lenses L31 to L34, and the 4th lens group G4 is composed of one lens L41. The focusing lens group Gf is the 3rd lens group G3 as a whole.

[0170] The basic lens data of the zoom lens of Example 2 is shown in Table 4, the specifications and variable surface intervals are shown in Table 5, the aspheric surface coefficients are shown in Table 6, and the aberration diagrams are shown in Figure 14 Figs. 8A to 8C.

[0171] [Table 4]

[0172] Example 2

[0173] Sn R D Nd νd θgF 1 41.57886 2.100 1.85150 40.78 0.56958 2 24.25407 6.125 *3 75.00000 2.504 1.69259 53.07 0.54955 *4 18.47265 7.966 *5 35.69926 2.100 1.85108 40.12 0.56852 *6 17.26489 8.101 7 46.17859 1.146 1.43875 94.66 0.53402 8 26.32898 5.100 1.95375 32.32 0.59015 9 262.11995 DD[9] 10 (St) ∞ 1.300 *11 26.80662 4.452 1.69350 53.18 0.54831 *12 -35.63650 0.566 13 -61.30614 0.820 1.75500 52.32 0.54737 14 20.38264 2.417 1.59522 67.73 0.54426 15 178.44871 1.659 16 -317.69015 0.810 1.81600 46.62 0.55682 17 19.46256 3.500 1.64769 33.79 0.59393 18 -81.81627 3.300 19 -277.52941 0.810 1.83481 42.72 0.56486 20 22.47336 4.482 1.59282 68.62 0.54414 21 -34.64629 2.116 22 42.23848 0.880 1.85150 40.78 0.56958 23 17.93578 4.893 1.43875 94.66 0.53402 24 -57.98556 0.150 25 25.48677 5.959 1.43875 94.66 0.53402 26 -25.37606 DD

[26] *27 -60.59195 2.288 1.85135 40.10 0.56954 *28 -22.78953 0.150 29 170.69147 0.890 1.88300 40.76 0.56679 30 12.07645 5.852 1.49700 81.54 0.53748 31 -141.73694 0.850 1.88300 40.76 0.56679 32 24.97038 DD

[32] 33 131.85158 2.500 1.95906 17.47 0.65993 34 -104.15265 8.943 35 ∞ 2.850 1.51680 64.20 0.53430 36 ∞ 0.998

[0174] [Table 5]

[0175] Example 2

[0176] W-Infinity T-Infinity W-500mm T-500mm Zr 1.000 1.883 - - f 8.238 15.517 8.195 15.323 FNo. 2.88 2.88 2.86 2.88 2ω(°) 125.8 82.2 126.0 82.6 DD[9] 29.463 3.031 29.463 3.031 DD

[26] 2.200 7.022 2.317 7.316 DD

[32] 3.525 8.963 3.408 8.670

[0177] [Table 6]

[0178] Example 2

[0179] Sn 3 4 5 6 KA 1.0000000E+00 1.0000000E+00 1.0000000E+00 1.0000000E+00 A3 0.0000000E+00 0.0000000E+00 0.0000000E+00 0.0000000E+00 A4 1.5156791E-04 1.6374914E-04 -8.8814963E-05 -1.0516987E-04 A5 -9.0712096E-06 -1.7761710E-05 -1.8121361E-05 -1.9226538E-05 A6 -9.2049009E-07 1.2690117E-07 4.3273839E-06 5.7643749E-06 A7 1.3501012E-07 1.6616531E-07 2.7891184E-07 1.8068743E-07 A8 -7.0607683E-10 -2.5650069E-08 -8.3364000E-08 -1.1421078E-07 A9 -9.3380967E-10 3.2446511E-09 -2.6690256E-09 -7.2236724E-10 A10 3.7112077E-11 -3.7601892E-10 9.0189314E-10 1.6310740E-09 A11 3.8730063E-12 1.0528382E-11 1.7826049E-11 -7.7246524E-11 A12 -2.1801993E-13 2.4804841E-12 -6.1170327E-12 -9.2933398E-12 A13 -1.0001266E-14 -2.2284338E-13 -7.7659318E-14 1.2135241E-12 A14 6.5297267E-16 3.1132163E-15 2.6275845E-14 -1.5859194E-14 A15 1.5600421E-17 4.2397882E-16 1.9733519E-16 -6.8377351E-15 A16 -1.1114900E-18 -3.3465602E-17 -6.8550768E-17 3.6853799E-16 A17 -1.3315482E-20 9.4421093E-19 -2.5653251E-19 1.5918878E-17 A18 1.0237693E-21 3.1045963E-20 9.8373488E-20 -1.3183203E-18 A19 4.7249477E-24 -2.3173255E-21 1.2756392E-22 -1.2072567E-20 A20 -3.9773030E-25 2.9331005E-23 -5.9369543E-23 1.4970035E-21

[0180] Sn 11 12 27 28 KA 1.0000000E+00 1.0000000E+00 1.0000000E+00 1.0000000E+00 A3 0.0000000E+00 0.0000000E+00 0.0000000E+00 0.0000000E+00 A4 8.5013625E-06 3.7181176E-05 -3.2617943E-05 4.9919455E-05 A5 -1.0632579E-05 -7.1364321E-06 2.4946959E-05 -9.5939703E-06 A6 5.0286367E-06 3.0821562E-06 -2.6744343E-05 -1.8216522E-06 A7 -3.4509972E-07 -7.3929168E-07 1.0475990E-05 7.4076796E-07 A8 -5.4904660E-07 1.0309078E-07 -1.7888595E-06 5.4487057E-09 A9 1.9465468E-07 2.4163434E-08 -1.8253488E-08 -2.9098532E-08 A10 -1.2451284E-08 -1.6651615E-08 5.7224245E-08 1.8045725E-09 A11 -4.7794533E-09 2.0283161E-09 -7.1464254E-09 6.6952922E-10 A12 6.8206386E-10 4.7502649E-10 -2.7951142E-10 -6.6775033E-11 A13 6.1078129E-11 -1.1926956E-10 1.2731880E-10 -9.3706892E-12 A14 -1.1895987E-11 -2.8048301E-12 -6.6195473E-12 1.1702961E-12 A15 -8.3816391E-13 2.4980730E-12 -6.5672099E-13 7.8505572E-14 A16 1.4724643E-13 -8.1177234E-14 8.2505317E-14 -1.1326790E-14 A17 8.7093403E-15 -2.4247830E-14 -1.2144609E-15 -3.6190285E-16 A18 -1.2640897E-15 1.4587642E-15 -2.3266490E-16 5.8242693E-17 A19 -3.5687348E-17 9.1266978E-17 1.3805449E-17 7.0603159E-19 A20 4.7637251E-18 -7.0550367E-18 -2.5097872E-19 -1.2437938E-19

[0181] [Example 3]

[0182] The sectional view and the schematic movement trajectory of the zoom lens of Example 3 are shown in Figure 4 Figs. 9A to 9C. The zoom lens of Example 3 is composed of, in order from the object side toward the image side, a first lens group Gl having a negative refractive power, a second lens group G2 having a positive refractive power, a third lens group G3 having a positive refractive power, and a fourth lens group G4 having a negative refractive power. When zooming from the wide-angle end to the telephoto end, the first lens group Gl moves toward the image side, the second lens group G2, the third lens group G3, and the fourth lens group G4 move toward the object side, and all the intervals of the adjacent lens groups change. The first lens group Gl is composed of, in order from the object side toward the image side, five lenses Ll l to Ll 5, the second lens group G2 is composed of, in order from the object side toward the image side, an aperture stop St and five lenses L21 to L25, the third lens group G3 is composed of, in order from the object side toward the image side, five lenses L31 to L35, and the fourth lens group G4 is composed of, in order from the object side toward the image side, four lenses L41 to L44. The focus lens group Gf is the entire fourth lens group G4.

[0183] The basic lens data of the zoom lens of Example 3 is shown in Table 7, the specifications and variable surface intervals are shown in Table 8, the aspheric surface coefficients are shown in Table 9, and the aberration diagrams are shown in Figure 15 Figs. 10A to 10C.

[0184] [Table 7]

[0185] Example 3

[0186] Sn R D Nd νd θgF 1 37.99918 2.050 1.81352 46.65 0.55465 2 24.14081 5.099 *3 35.59663 2.504 1.99289 23.69 0.62146 *4 19.04644 4.779 *5 42.92988 2.100 1.85108 40.12 0.56852 *6 17.08576 11.798 7 -33.34593 1.120 1.43875 94.66 0.53402 8 30.28942 4.699 1.95375 32.32 0.59015 9 -1553.33353 DD[9] 10 (St) ∞ 1.314 *11 30.80661 6.239 1.77794 50.21 0.54894 *12 -42.33093 0.100 13 -71.71406 0.820 1.74073 50.89 0.55099 14 24.54512 2.469 1.49700 81.54 0.53748 15 -399.64726 1.121 16 -470.41576 0.790 1.83259 44.74 0.55815 17 17.16717 3.493 1.68073 31.38 0.59488 18 -84.47041 DD

[18] 19 -158.35527 0.810 1.84607 43.39 0.56082 20 20.45760 4.379 1.59522 67.73 0.54426 21 -34.34684 1.499 22 47.46752 0.880 1.85312 40.61 0.56839 23 18.09806 5.018 1.43875 94.66 0.53402 24 -45.56510 0.100 25 26.85043 5.802 1.43875 94.66 0.53402 26 -22.66757 DD

[26] *27 -55.13921 2.165 1.85135 40.10 0.56954 *28 -23.68550 0.100 29 261.49355 0.890 1.88300 40.76 0.56679 30 12.58792 5.610 1.49700 81.54 0.53748 31 99.37997 0.850 1.88300 40.76 0.56679 32 30.07342 DD

[32] 33 ∞ 2.850 1.51680 64.20 0.53430 34 ∞ 0.999

[0187] [Table 8]

[0188] Example 3

[0189] W-Infinity T-Infinity W-500mm T-500mm Zr 1.000 1.883 - - f 9.265 17.451 9.198 17.117 FNo. 2.89 3.08 2.89 3.07 2ω(°) 121.0 76.8 121.2 77.2 DD[9] 29.998 2.633 29.998 2.633 DD

[18] 3.000 2.605 3.000 2.605 DD

[26] 2.055 5.567 2.195 5.900 DD

[32] 14.970 21.200 14.830 20.868

[0190] [Table 9]

[0191] Example 3

[0192] Sn 3 4 5 6 KA 1.0000000E+00 1.0000000E+00 1.0000000E+00 1.0000000E+00 A3 0.0000000E+00 0.0000000E+00 0.0000000E+00 0.0000000E+00 A4 1.8653627E-05 -1.1249714E-05 3.6774134E-05 5.4538416E-05 A5 5.4631576E-07 2.6719413E-06 -3.8926308E-07 2.4279446E-06 A6 -4.3657788E-08 2.7010546E-07 1.1365741E-06 1.0970747E-06 A7 6.4042895E-09 -4.5270907E-08 1.2306813E-07 6.5575677E-08 A8 -1.6980981E-09 1.5229011E-10 -2.9597008E-08 -3.0893979E-08 A9 -1.1629932E-10 4.3579310E-10 -2.0002280E-09 -1.7685576E-09 A10 1.8465428E-11 -5.7910082E-11 3.1290814E-10 3.6785292E-10 A11 7.6190855E-13 -2.4789705E-12 1.7767508E-11 1.3104759E-11 A12 -8.6113503E-14 6.3341097E-13 -2.0558369E-12 -2.8242882E-12 A13 -2.6321701E-15 8.4672178E-15 -9.0257914E-14 3.4455869E-14 A14 2.1838804E-16 -2.8362378E-15 8.8187018E-15 1.2002433E-14 A15 5.0664220E-18 -1.6347103E-17 2.5331244E-16 -1.0257913E-15 A16 -3.1186625E-19 5.2804074E-18 -2.3226910E-17 -3.8788912E-18 A17 -5.1403336E-21 1.4460835E-20 -3.5949537E-19 5.1891087E-18 A18 2.3427439E-22 -1.2301601E-21 3.3201571E-20 -1.5551891E-19 A19 2.1453680E-24 -2.1312597E-24 1.9814768E-22 -8.4230290E-21 A20 -7.1222569E-26 -5.1665384E-24 -1.9382541E-23 3.7039395E-22

[0193] Sn 11 12 27 28 KA 1.0000000E+00 1.0000000E+00 1.0000000E+00 1.0000000E+00 A3 0.0000000E+00 0.0000000E+00 0.0000000E+00 0.0000000E+00 A4 1.2347920E-05 8.1546419E-06 -8.2942493E-05 2.1750019E-05 A5 -8.8716527E-06 1.5376740E-05 4.3001829E-05 -2.1594780E-05 A6 1.5967426E-06 -2.7311680E-06 -2.6894541E-05 6.4033127E-06 A7 2.9623001E-07 -1.2522831E-06 1.0254390E-05 6.2601402E-07 A8 -4.7555152E-08 5.5735626E-07 -1.8342978E-06 -4.5779192E-07 A9 -3.2382724E-08 -6.2854035E-09 -2.1012585E-08 1.0366821E-08 A10 3.4554272E-09 -3.2039148E-08 6.1952713E-08 1.4493944E-08 A11 1.9451415E-09 4.3094838E-09 -7.4166387E-09 -9.0472639E-10 A12 -2.6402955E-10 7.2546476E-10 -3.6147037E-10 -2.5315989E-10 A13 -5.1438216E-11 -1.8677460E-10 1.3335709E-10 2.0689556E-11 A14 8.7946270E-12 -4.1184787E-12 -6.0801859E-12 2.5426916E-12 A15 6.2022429E-13 3.7896816E-12 -6.6634932E-13 -2.3269348E-13 A16 -1.3800331E-13 -1.3499925E-13 7.8955818E-14 -1.4053020E-14 A17 -2.8974041E-15 -3.6109174E-14 -1.6593657E-15 1.3190157E-15 A18 1.0122026E-15 2.3256214E-15 -1.9197625E-16 3.6194488E-17 A19 8.6045771E-19 1.3934838E-16 1.6095999E-17 -3.0132977E-18 A20 -2.7124865E-18 -1.1500892E-17 -4.3047273E-19 -2.3000887E-20

[0194] [Example 4]

[0195] A cross-sectional view and schematic movement trajectory of the zoom lens in Example 4 are shown below. Figure 5 The zoom lens of Example 4 has the same general structure as the zoom lens of Example 1. Basic lens data for the zoom lens of Example 4 are shown in Table 10, specifications and variable surface spacing are shown in Table 11, aspherical coefficients are shown in Table 12, and various aberrations are illustrated in Table 13. Figure 16 middle.

[0196] [Table 10]

[0197] Example 4

[0198] Sn R D Nd νd θgF 1 42.67431 2.050 1.85150 40.78 0.56958 2 24.17403 7.218 *3 186.38308 2.504 1.69350 53.18 0.54831 *4 18.76100 6.342 *5 27.10033 2.100 1.85108 40.12 0.56852 *6 17.33532 8.887 7 -37.31014 1.161 1.43875 94.66 0.53402 8 26.93188 4.990 1.95375 32.32 0.59015 9 294.00006 DD[9] 10 (St) ∞ 1.300 *11 25.98740 5.209 1.69350 53.18 0.54831 *12 -37.87609 0.161 13 -71.74406 0.820 1.73354 50.92 0.55158 14 23.13730 2.423 1.59522 67.73 0.54426 15 272.15551 1.696 16 -438.10014 0.790 1.83954 44.05 0.55951 17 17.80689 3.333 1.64769 33.79 0.59393 18 -95.82496 DD

[18] 19 -160.67334 0.810 1.84584 43.42 0.56078 20 20.65061 4.297 1.59522 67.73 0.54426 21 -36.01869 2.187 22 42.31198 0.880 1.83517 44.22 0.55940 23 17.93272 4.972 1.43875 94.66 0.53402 24 -51.39177 0.181 25 26.04523 5.716 1.43875 94.66 0.53402 26 -24.11193 DD

[26] *27 -62.75366 2.250 1.85135 40.10 0.56954 *28 -23.11976 0.169 29 160.90135 0.899 1.88300 40.76 0.56679 30 12.14725 5.630 1.49700 81.54 0.53748 31 -650.23820 0.850 1.88300 40.76 0.56679 32 24.56773 DD

[32] 33 186.91532 2.241 1.95906 17.47 0.65993 34 -106.63809 8.957 35 ∞ 2.850 1.51680 64.20 0.53430 36 ∞ 1.001

[0199] [Table 11]

[0200] Example 4

[0201] W-Infinity T-Infinity W-500mm T-500mm Zr 1.000 1.883 - - f 8.236 15.513 8.192 15.310 FNo. 2.89 2.88 2.83 2.84 2ω(°) 125.8 82.2 126.0 82.6 DD[9] 29.677 3.146 29.677 3.146 DD

[18] 3.300 2.597 3.300 2.597 DD

[26] 2.292 7.117 2.414 7.420 DD

[32] 3.670 9.122 3.548 8.819

[0202] [Table 12]

[0203] Example 4

[0204] Sn 3 4 5 6 KA 1.0000000E+00 1.0000000E+00 1.0000000E+00 1.0000000E+00 A3 0.0000000E+00 0.0000000E+00 0.0000000E+00 0.0000000E+00 A4 2.1445858E-04 1.8461883E-04 -9.9451065E-05 -1.0906043E-04 A5 -1.2985368E-05 -1.0276536E-05 -1.8928099E-05 -1.8477134E-05 A6 -1.8231203E-06 -1.7101198E-06 3.6234741E-06 5.1614028E-06 A7 2.0074909E-07 -4.0339021E-08 2.9745042E-07 1.4877817E-07 A8 5.3954269E-09 2.4237593E-08 -7.3434536E-08 -1.1587250E-07 A9 -1.4924077E-09 2.1920222E-09 -2.8111215E-09 3.8059684E-09 A10 2.2509337E-11 -4.4007090E-10 8.7573188E-10 1.3795096E-09 A11 6.4380756E-12 -2.2330857E-11 1.8483791E-11 -1.1020155E-10 A12 -2.4169095E-13 4.8045007E-12 -6.5447584E-12 -7.7291138E-12 A13 -1.6909836E-14 1.1579301E-13 -7.9024448E-14 1.2515626E-12 A14 8.7441380E-16 -2.9447988E-14 3.0505737E-14 1.4431896E-16 A15 2.6729528E-17 -3.4578372E-16 1.9651707E-16 -7.4977127E-15 A16 -1.6506986E-18 1.0169269E-16 -8.5263067E-17 2.3649071E-16 A17 -2.3394713E-20 5.7555226E-19 -2.4621714E-19 2.3175488E-17 A18 1.6313682E-21 -1.8580166E-19 1.3009301E-19 -1.1434451E-18 A19 8.7255160E-24 -4.2121116E-22 1.1262502E-22 -2.8962941E-20 A20 -6.6986610E-25 1.4019617E-22 -8.3130498E-23 1.7554360E-21

[0205] Sn 11 12 27 28 KA 1.0000000E+00 1.0000000E+00 1.0000000E+00 1.0000000E+00 A3 0.0000000E+00 0.0000000E+00 0.0000000E+00 0.0000000E+00 A4 1.3870308E-05 3.4408218E-05 -4.9852148E-05 7.0704335E-05 A5 -6.1377377E-06 -9.2976724E-07 3.6346981E-05 -2.8667850E-05 A6 1.6839811E-06 2.1508636E-06 -2.9076299E-05 3.1860450E-06 A7 -1.1998101E-07 -9.7173789E-07 1.0451078E-05 1.1265996E-06 A8 -2.7600084E-08 1.6408518E-07 -1.7136700E-06 -3.2201902E-07 A9 5.7943768E-09 3.2018083E-08 -2.4313123E-08 -9.6344043E-09 A10 -1.9503453E-10 -1.8323815E-08 5.7437014E-08 1.0755792E-08 A11 2.6957849E-10 1.5646972E-09 -7.4019612E-09 -4.2522302E-10 A12 -6.8858616E-11 5.3622644E-10 -2.5485055E-10 -1.8665796E-10 A13 -1.0464501E-11 -1.0243464E-10 1.3381511E-10 1.3641831E-11 A14 3.7334450E-12 -5.6492979E-12 -7.6502144E-12 1.7883771E-12 A15 5.2379685E-14 2.4053660E-12 -6.7509620E-13 -1.7058365E-13 A16 -6.9105098E-14 -4.8592127E-14 9.2941619E-14 -8.8014053E-15 A17 1.2502318E-15 -2.4268411E-14 -1.5973514E-15 1.0183495E-15 A18 5.5457564E-16 1.2608473E-15 -2.6086785E-16 1.5800993E-17 A19 -1.1465453E-17 9.7877074E-17 1.5932396E-17 -2.3995132E-18 A20 -1.6242722E-18 -6.9875921E-18 -2.8644656E-19 1.0828343E-20

[0206] [Example 5]

[0207] A cross-sectional view and schematic movement trajectory of the zoom lens in Example 5 are shown below. Figure 6 The zoom lens of Example 5 has the same general structure as the zoom lens of Example 1. Basic lens data for the zoom lens of Example 5 are shown in Table 13, specifications and variable surface spacing are shown in Table 14, aspherical coefficients are shown in Table 15, and various aberrations are illustrated in Table 16. Figure 17 In.

[0208] [Table 13]

[0209] Example 5

[0210] Sn R D Nd νd θgF 1 38.95404 2.050 1.59964 61.17 0.54207 2 24.29601 6.461 3 36.16852 2.504 1.95986 29.28 0.60068 4 19.41637 4.501 *5 55.83133 2.100 1.85108 40.12 0.56852 *6 17.07895 11.507 7 36.94534 1.410 1.43875 94.66 0.53402 8 28.85934 5.496 1.95375 32.32 0.59015 9 7631.46066 DD[9] 10 (St) ∞ 1.400 *11 30.78601 7.000 1.78831 49.17 0.55050 *12 -42.25353 0.100 13 -72.06911 0.820 1.73493 43.37 0.56861 14 25.11815 3.000 1.49700 81.54 0.53748 15 -462.01491 1.248 16 -446.27718 0.810 1.83102 44.90 0.55785 17 17.21951 4.402 1.68037 31.40 0.59482 18 -88.23306 DD

[18] 19 -154.73880 0.810 1.84875 43.13 0.56138 20 20.58594 4.370 1.59522 67.73 0.54426 21 -34.11180 1.500 22 48.07929 0.880 1.85369 42.63 0.56241 23 18.18623 4.989 1.43875 94.66 0.53402 24 -46.01267 0.218 25 26.55479 5.798 1.43875 94.66 0.53402 26 -22.98546 DD

[26] *27 -55.09969 2.222 1.85135 40.10 0.56954 *28 -23.71329 0.178 29 325.34179 0.890 1.88300 40.76 0.56679 30 12.39644 5.769 1.49700 81.54 0.53748 31 -124.40641 0.850 1.88300 40.76 0.56679 32 27.25871 DD

[32] 33 258.79796 2.209 1.95906 17.47 0.65993 34 -100.37566 8.821 35 ∞ 2.850 1.51680 64.20 0.53430 36 ∞ 1.000

[0211] [Table 14]

[0212] Example 5

[0213] W-Infinity T-Infinity W-500mm T-500mm Zr 1.000 1.883 - - f 9.267 17.454 9.201 17.171 FNo. 2.89 3.03 2.89 3.02 2ω(°) 121.0 76.8 121.4 77.2 DD[9] 30.402 2.885 30.402 2.885 DD

[18] 3.000 2.366 3.000 2.366 DD

[26] 2.474 6.282 2.603 6.581 DD

[32] 3.408 9.972 3.279 9.673

[0214] [Table 15]

[0215] Example 5

[0216] Sn 5 6 11 12 KA 1.0000000E+00 1.0000000E+00 1.0000000E+00 1.0000000E+00 A3 0.0000000E+00 0.0000000E+00 0.0000000E+00 0.0000000E+00 A4 2.0772371E-04 2.1632508E-04 1.3826615E-05 1.5775499E-05 A5 -4.1471929E-06 -9.8785219E-07 -6.9889974E-06 1.3419060E-05 A6 -3.1143594E-06 -3.7514022E-06 1.9974955E-06 -2.7890153E-06 A7 1.7787261E-07 8.3797182E-08 -8.6684708E-08 -1.0340126E-06 A8 2.8665480E-08 4.6521246E-08 -4.6580772E-08 5.4165665E-07 A9 -2.4917792E-09 -1.2711851E-09 2.3780837E-09 -1.5194860E-08 A10 -1.6995693E-10 -3.9769932E-10 3.5898884E-10 -3.1479767E-08 A11 2.0579761E-11 1.8314111E-12 4.2716089E-10 4.5115844E-09 A12 5.0157450E-13 2.4650398E-12 -6.4331176E-11 7.3514117E-10 A13 -1.0065191E-13 1.4088074E-13 -1.5217439E-11 -1.8892909E-10 A14 -2.3232230E-17 -1.5818956E-14 2.9853151E-12 -5.1732299E-12 A15 2.7747474E-16 -1.5650129E-15 1.3900173E-13 3.7904676E-12 A16 -3.6766558E-18 1.0398961E-16 -4.8689669E-14 -1.0793788E-13 A17 -3.9172344E-19 6.6253374E-18 4.1371128E-16 -3.5932906E-14 A18 7.9372975E-21 -4.1542718E-19 3.0715607E-16 2.0185135E-15 A19 2.1699753E-22 -1.0008167E-20 -8.1902841E-18 1.3831668E-16 A20 -4.8577618E-24 6.4757165E-22 -4.6179543E-19 -1-0164821E-17

[0217] Sn 27 28 KA 1.0000000E+00 1.0000000E+00 A3 0.0000000E+00 0.0000000E+00 A4 -6.1140987E-05 3.2909579E-05 A5 3.5907112E-05 -2.4137581E-05 A6 -2.8614464E-05 5.0471046E-06 A7 1.0698290E-05 7.1457390E-07 A8 -1.7422518E-06 -3.6422952E-07 A9 -3.7463861E-08 8.3383377E-09 A10 5.8692232E-08 1.0747926E-08 A11 -7.0438545E-09 -8.7608398E-10 A12 -2.8756471E-10 -1.6344056E-10 A13 1.2813248E-10 2.0455516E-11 A14 -7.1396755E-12 1.2309547E-12 A15 -6.2217890E-13 -2.3174784E-13 A16 8.8240113E-14 -2.5667183E-15 A17 -1.8657032E-15 1.3182165E-15 A18 -2.3729374E-16 -1.9140597E-17 A19 1.6504872E-17 -3.0171406E-18 A20 -3.3620442E-19 8.9735427E-20

[0218] [Example 6]

[0219] A sectional view and a schematic movement locus of the zoom lens of Example 6 are shown in Figure 7 The zoom lens of Example 6 has the same structure as the outline structure of the zoom lens of Example 1. Basic lens data of the zoom lens of Example 6 is shown in Table 16, specifications and variable face intervals are shown in Table 17, aspherical coefficients are shown in Table 18, and each aberration diagram is shown in Figure 18

[0220] [Table 16]

[0221] Example 6

[0222] Sn R D Nd νd θgF 1 44.04000 2.050 1.85150 40.78 0.56958 2 24.24864 6.981 *3 154.83912 2.504 1.69350 53.18 0.54831 *4 20.19733 6.438 *5 29.09945 2.100 1.85108 40.12 0.56852 *6 17.13338 8.955 7 -37.39517 1.120 1.43875 94.66 0.53402 8 28.39216 5.078 1.95375 32.32 0.59015 9 474.79304 DD[9] 10 (St) ∞ 1.300 *11 31.62408 7.000 1.80998 40.95 0.56644 *12 -45.95742 0.409 13 -79.85552 0.820 1.72047 34.71 0.58350 14 24.37152 2.379 1.49700 81.54 0.53748 15 -549.86003 1.049 16 -574.16402 0.790 1.81600 46.62 0.55682 17 16.36729 3.437 1.67270 32.10 0.59891 18 -107.22047 DD

[18] 19 -156.44300 0.810 1.83481 42.72 0.56486 20 21.67065 4.205 1.59522 67.73 0.54426 21 -36.75822 2.097 22 45.85301 0.880 1.83481 42.72 0.56486 23 18.47924 4.871 1.43875 94.66 0.53402 24 -55.78370 0.101 25 28.05382 5.706 1.43875 94.66 0.53402 26 -22.93917 DD

[26] *27 -57.58300 2.623 1.85135 40.10 0.56954 *28 -23.68806 0.100 29 160.08829 0.890 1.88300 40.76 0.56679 30 12.00014 6.016 1.49700 81.54 0.53748 31 -158.21498 0.850 1.88300 40.76 0.56679 32 29.96082 DD

[32] 33 141.85857 2.380 1.95906 17.47 0.65993 34 -111.48733 9.154 35 ∞ 2.850 1.51680 64.20 0.53430 36 ∞ 1.000

[0223] [Table 17]

[0224] Example 6

[0225] W-Infinity T-Infinity W-500mm T-500mm Zr 1.000 1.883 - - f 8.238 15.516 8.196 15.326 FNo. 2.88 2.88 2.88 2.87 2ω(°) 127.0 82.8 127.2 83.2 DD[9] 29.648 2.884 29.648 2.884 DD

[18] 3.490 2.833 3.490 2.833 DD

[26] 2.000 7.132 2.127 7.452 DD

[32] 3.432 8.874 3.305 8.555

[0226] [Table 18]

[0227] Example 6

[0228] Sn 3 4 5 6 KA 1.0000000E+00 1.0000000E+00 1.0000000E+00 1.0000000E+00 A3 0.0000000E+00 0.0000000E+00 0.0000000E+00 0.0000000E+00 A4 2.1423762E-04 2.1440967E-04 -4.4333454E-05 -4.2166156E-05 A5 -1.2860612E-05 -1.4833935E-05 -6.7407497E-06 -1.4656569E-05 A6 -2.2230835E-06 -1.6725069E-06 5.7894923E-07 3.2751332E-06 A7 2.2005520E-07 -2.6036575E-09 1.2265825E-07 -7.4943007E-09 A8 9.9925805E-09 1.2874461E-08 -8.0755244E-09 -7.4707534E-08 A9 -1.7282871E-09 2.7825445E-09 -1.2695205E-09 7.6514628E-09 A10 -1.9846229E-12 -2.0831625E-10 1.0802086E-10 8.2849948E-10 A11 7.7561162E-12 -3.4586025E-11 1.0254071E-11 -1.6617348E-10 A12 -1.7228286E-13 2.5251030E-12 -1.1173814E-12 -3.0949327E-12 A13 -2.0928965E-14 2.0736951E-13 -5.4518550E-14 1.7223681E-12 A14 7.7750415E-16 -1.6062516E-14 6.6420253E-15 -2.5351650E-14 A15 3.3579792E-17 -6.9067559E-16 1.6104324E-16 -9.7966289E-15 A16 -1.6239313E-18 5.3904155E-17 -2.1276004E-17 3.2648525E-16 A17 -2.9466587E-20 1.2233749E-18 -2.3466829E-19 2.9236360E-17 A18 1.7139629E-21 -9.1154381E-20 3.4456476E-20 -1.3248173E-18 A19 1.0874543E-23 -9.0037505E-22 1.2873223E-22 -3.5650707E-20 A20 -7.3870423E-25 6.1179838E-23 -2.2189480E-23 1.9101090E-21

[0229] Sn 11 12 27 28 KA 1.0000000E+00 1.0000000E+00 1.0000000E+00 1.0000000E+00 A3 0.0000000E+00 0.0000000E+00 0.0000000E+00 0.0000000E+00 A4 1.9849890E-05 3.2218499E-05 1.0918038E-05 1.1989134E-04 A5 -7.6007113E-06 -1.1886776E-05 -6.0674016E-06 -3.3785499E-05 A6 -6.9919185E-07 8.9983427E-06 -1.1736718E-06 9.2147691E-07 A7 8.4763986E-07 -2.4027339E-06 2.7572327E-07 1.6475087E-06 A8 7.2612963E-08 -1.1557586E-07 2.5619232E-08 -2.5134088E-07 A9 -8.4585482E-08 1.7378028E-07 -8.4908382E-09 -3.2029399E-08 A10 5.3796563E-10 -1.8299834E-08 1.0637345E-11 9.6163797E-09 A11 4.5791792E-09 -4.5748454E-09 1.7020255E-10 1.1581511E-10 A12 -3.0070219E-10 9.1518481E-10 -1.2272838E-11 -1.7967278E-10 A13 -1.2826106E-10 4.4411464E-11 -2.1763795E-12 5.7956884E-12 A14 1.2817630E-11 -1.9280095E-11 2.8328002E-13 1.8364760E-12 A15 1.9257080E-12 3.7346071E-13 1.7104935E-14 -1.0312909E-13 A16 -2.3826486E-13 1.7938670E-13 -3.1210304E-15 -9.8248294E-15 A17 -1.4911582E-14 -9.1401909E-15 -7.5201681E-17 7.0088430E-16 A18 2.1374327E-15 -6.4700736E-16 1.7567024E-17 2.1530224E-17 A19 4.7350473E-17 5.1025190E-17 1.4141081E-19 -1.7689095E-18 A20 -7.6372357E-18 -5.4238076E-19 -4.0498652E-20 2.2781682E-22

[0230] [Example 7]

[0231] A sectional view and a schematic movement locus of the zoom lens of Example 7 are shown in Figure 8 ​The zoom lens of Example 7 is composed of, in order from the object side toward the image side, the 1st lens group G1 having a negative refractive power, the 2nd lens group G2 having a positive refractive power, the 3rd lens group G3 having a positive refractive power, the 4th lens group G4 having a positive refractive power, the 5th lens group G5 having a negative refractive power, and the 6th lens group G6 having a positive refractive power. When zooming from the wide-angle end to the telephoto end, the 1st lens group G1 moves toward the image side, the 2nd lens group G2, the 3rd lens group G3, the 4th lens group G4, and the 5th lens group G5 move toward the object side, and the 6th lens group G6 is fixed with respect to the image plane Sim, and all the intervals of the adjacent lens groups change. The 1st lens group G1 is composed of, in order from the object side toward the image side, the 5 lenses L11 to L15, the 2nd lens group G2 is composed of, in order from the object side toward the image side, the aperture stop St and the 5 lenses L21 to L25, the 3rd lens group G3 is composed of, in order from the object side toward the image side, the 2 lenses L31 to L32, the 4th lens group G4 is composed of, in order from the object side toward the image side, the 3 lenses L41 to L43, the 5th lens group G5 is composed of, in order from the object side toward the image side, the 4 lenses L51 to L54, and the 6th lens group G6 is composed of the 1 lens L61. The focusing lens group Gf is the 5th lens group G5 as a whole. The above is the outline of the zoom lens of Example 7.

[0232] The basic lens data of the zoom lens of Example 7 is shown in Table 19, the specifications and variable face intervals are shown in Table 20, the aspheric surface coefficients are shown in Table 21, and the aberration diagrams of each are shown in Figure 19

[0233] [Table 19]

[0234] Example 7

[0235] Sn R D Nd νd θgF 1 41.41349 2.050 1.85150 40.78 0.56958 2 23.68980 7.769 *3 199.98788 2.504 1.69350 53.18 0.54831 *4 18.73877 6.380 *5 28.19466 2.100 1.85108 40.12 0.56852 *6 17.30816 8.877 7 -40.03562 1.120 1.43875 94.66 0.53402 8 27.48902 4.908 1.95375 32.32 0.59015 9 786.83703 DD[9] 10 (St) ∞ 1.300 *11 26.32190 4.783 1.69350 53.18 0.54831 *12 -38.38722 0.349 13 -67.29617 0.820 1.73623 52.87 0.54689 14 24.12365 2.232 1.59522 67.73 0.54426 15 206.47051 0.400 16 -317.40797 0.790 1.83256 44.74 0.55814 17 17.26597 3.377 1.64769 33.79 0.59393 18 -92.86424 DD

[18] 19 -168.26505 0.810 1.83838 42.57 0.56382 20 20.78142 4.333 1.59522 67.73 0.54426 21 -34.61154 DD

[21] ] 22 42.21395 0.880 1.82973 43.48 0.56192 23 18.02672 5.040 1.43875 94.66 0.53402 24 -48.65002 0.154 25 26.16490 5.758 1.43875 94.66 0.53402 26 -24.22834 DD

[26] *27 -61.27599 2.306 1.85135 40.10 0.56954 *28 -23.15576 0.154 29 139.18827 0.895 1.88300 40.76 0.56679 30 12.43898 5.652 1.49700 81.54 0.53748 31 -594.76701 0.850 1.88300 40.76 0.56679 32 25.22333 DD

[32] 33 295.93334 2.145 1.95906 17.47 0.65993 34 -107.09171 8.947 35 ∞ 2.850 1.51680 64.20 0.53430 36 ∞ 0.999

[0236] [Table 20]

[0237] Example 7

[0238] W-Infinity T-Infinity W-500mm T-500mm Zr 1.000 1.883 - - f 8.236 15.513 8.191 15.326 FNo. 2.89 2.88 2.71 2.86 2ω(°) 125.8 83.0 126.0 83.4 DD[9] 27.461 2.812 27.461 2.812 DD

[18] 3.629 2.866 3.629 2.866 DD

[21] 1.800 1.907 1.800 1.907 DD

[26] 2.304 5.348 2.432 5.632 DD

[32] 3.721 11.312 3.593 11.028

[0239] [Table 21]

[0240] Example 7

[0241] Sn 3 4 5 6 KA 1.0000000E+00 1.0000000E+00 1.0000000E+00 1.0000000E+00 A3 0.0000000E+00 0.0000000E+00 0.0000000E+00 0.0000000E+00 A4 1.8553228E-04 1.3000184E-04 -1.4792318E-04 -1.5306723E-04 A5 -1.1851358E-05 -8.4069821E-06 -1.5544082E-05 -1.4372529E-05 A6 -1.2659055E-06 -6.7543398E-07 4.8362473E-06 6.7974853E-06 A7 1.8761495E-07 -8.0505450E-08 2.4245530E-07 -1.1029997E-08 A8 -2.0805031E-10 1.8330809E-08 -8.8361107E-08 -1.4038291E-07 A9 -1.3997685E-09 2.7355343E-09 -2.3093577E-09 7.3217584E-09 A10 5.6155111E-11 -5.0180351E-10 9.7931536E-10 1.5624812E-09 A11 6.0301820E-12 -2.6844337E-11 1.5816741E-11 -1.5622836E-10 A12 -3.6807346E-13 6.0545668E-12 -6.9687921E-12 -8.3530659E-12 A13 -1.5795700E-14 1.3868447E-13 -7.0811183E-14 1.6187204E-12 A14 1.1731402E-15 -3.8440545E-14 3.1516817E-14 3.7421809E-16 A15 2.4898128E-17 -4.1488753E-16 1.8283073E-16 -9.2467812E-15 A16 -2.0814946E-18 1.3530839E-16 -8.6548556E-17 2.4016862E-16 A17 -2.1736241E-20 6.8958764E-19 -2.3636332E-19 2.7746103E-17 A18 1.9771119E-21 -2.5075486E-19 1.3073685E-19 -1.1489803E-18 A19 8.0896630E-24 -5.0042124E-22 1.1194514E-22 -3.4007141E-20 A20 -7.8808961E-25 1.9150718E-22 -8.3081387E-23 1.7533308E-21

[0242] Sn 11 12 27 28 KA 1.0000000E+00 1.0000000E+00 1.0000000E+00 1.0000000E+00 A3 0.0000000E+00 0.0000000E+00 0.0000000E+00 0.0000000E+00 A4 1.2953078E-05 3.8187078E-05 -5.3074031E-05 6.4427925E-05 A5 -1.1431193E-05 -3.9115044E-06 3.8936446E-05 -2.5777359E-05 A6 3.4816488E-06 2.0305904E-06 -2.8717510E-05 3.6642664E-06 A7 3.0023422E-07 -6.5395269E-07 1.0298252E-05 9.4260637E-07 A8 -2.4371425E-07 1.4178091E-07 -1.7426583E-06 -3.5149342E-07 A9 -5.4670342E-09 1.4350928E-08 -1.8365173E-08 -3.2612970E-09 A10 1.1260902E-08 -1.6124062E-08 5.8733961E-08 1.2010914E-08 A11 2.2763050E-10 2.1475395E-09 -7.5510424E-09 -5.5705836E-10 A12 -4.0397419E-10 4.4367988E-10 -2.8707194E-10 -2.1914572E-10 A13 -2.2081897E-12 -1.1405504E-10 1.3616276E-10 1.5330299E-11 A14 9.5557490E-12 -3.5033932E-12 -7.1855743E-12 2.2915109E-12 A15 -1.2027268E-13 2.5423780E-12 -6.9735936E-13 -1.8377007E-13 A16 -1.2940446E-13 -7.6845163E-14 8.9041920E-14 -1.3387991E-14 A17 2.7726178E-15 -2.5146835E-14 -1.4816220E-15 1.0759703E-15 A18 9.0086136E-16 1.4584662E-15 -2.4309853E-16 3.8600887E-17 A19 -1.6533706E-17 1.0023624E-16 1.5679569E-17 -2.5074494E-18 A20 -2.4778335E-18 -7.5577201E-18 -3.2059225E-19 -3.7003863E-20

[0243] [Example 8]

[0244] The sectional view and the schematic movement locus of the zoom lens of Example 8 are shown in Figure 9 ​The zoom lens of Example 8 has the same configuration as that of the zoom lens of Example 7 except that the 3rd lens group G3 has a negative refractive power. The basic lens data of the zoom lens of Example 8 is shown in Table 22, the specifications and variable surface intervals are shown in Table 23, the aspheric surface coefficients are shown in Table 24, and the aberration diagrams are shown in Figs. 28A to 28D. Figure 20

[0245] [Table 22]

[0246] Example 8

[0247] Sn R D Nd νd θgF 1 41.28848 2.050 1.85150 40.78 0.56958 2 23.79980 7.687 *3 180.00350 2.504 1.69350 53.18 0.54831 *4 18.77514 6.430 *5 28.05765 2.100 1.85108 40.12 0.56852 *6 17.24984 8.964 7 -37.41452 1.120 1.43875 94.66 0.53402 8 27.57374 4.978 1.95375 32.32 0.59015 9 717.69516 DD[9] 10 (St) ∞ 1.300 *11 25.89581 5.160 1.69350 53.18 0.54831 *12 -37.94826 0.245 13 -69.40994 0.820 1.73135 51.51 0.55044 14 25.15690 2.208 1.59522 67.73 0.54426 15 235.28308 0.400 16 -373.54363 0.807 1.82926 45.07 0.55751 17 17.53423 4.254 1.64769 33.79 0.59393 18 -88.29190 DD

[18] 19 -100.00000 0.810 1.83438 41.71 0.56655 20 20.78142 4.317 1.59522 67.73 0.54426 21 -36.00000 DD

[21] ] 22 42.27530 0.958 1.83348 44.64 0.55836 23 18.00679 5.050 1.43875 94.66 0.53402 24 -47.63396 0.153 25 26.18926 5.898 1.43875 94.66 0.53402 26 -24.44917 DD

[26] *27 -61.27006 2.391 1.85135 40.10 0.56954 *28 -23.18567 0.150 29 139.58321 0.904 1.88300 40.76 0.56679 30 12.31147 5.630 1.49700 81.54 0.53748 31 -712.05790 0.850 1.88300 40.76 0.56679 32 25.13792 DD

[32] 33 235.51432 2.299 1.95906 17.47 0.65993 34 -94.05982 8.956 35 ∞ 2.850 1.51680 64.20 0.53430 36 ∞ 1.000

[0248] [Table 23]

[0249] Example 8

[0250] W-Infinity T-Infinity W-Infinity T-Infinity Zr 1.000 1.883 - - f 8.237 15.515 8.193 15.326 FNo. 2.88 2.88 2.88 2.87 2ω(°) 125.8 82.4 126.0 82.8 DD[9] 28.542 2.827 28.542 2.827 DD

[26] 3.443 3.029 3.443 3.029 DD

[32] 1.800 1.572 1.800 1.572 Sn 2.516 6.639 2.646 6.946 KA 3.698 10.127 3.568 9.820

[0251] [Table 24]

[0252] Example 8

[0253] Sn 3 4 5 6 KA 1.0000000E+00 1.0000000E+00 1.0000000E+00 1.0000000E+00 A3 0.0000000E+00 0.0000000E+00 0.0000000E+00 0.0000000E+00 A4 1.7817121E-04 1.2444958E-04 -1.5587216E-04 -1.6218411E-04 A5 -1.1802753E-05 -8.9427786E-06 -1.6729001E-05 -1.5553424E-05 A6 -1.1501893E-06 -6.1712191E-07 4.9713132E-06 6.9411257E-06 A7 1.8547406E-07 -6.5020599E-08 2.6695675E-07 9.1785685E-09 A8 -1.1206100E-09 1.8976916E-08 -8.9674357E-08 -1.4072804E-07 A9 -1.3787239E-09 2.5137525E-09 -2.5904793E-09 7.0965568E-09 A10 5.9938885E-11 -5.1833720E-10 9.8728804E-10 1.5282655E-09 A11 5.9228813E-12 -2.4987063E-11 1.7759970E-11 -1.5463453E-10 A12 -3.7586298E-13 6.1853726E-12 -7.0000889E-12 -7.6510182E-12 A13 -1.5476728E-14 1.2913358E-13 -7.9095186E-14 1.6117876E-12 A14 1.1765419E-15 -3.8945337E-14 3.1594679E-14 -6.3305179E-15 A15 2.4343431E-17 -3.8518743E-16 2.0414552E-16 -9.2294545E-15 A16 -2.0644460E-18 1.3624220E-16 -8.6659745E-17 2.7514649E-16 A17 -2.1213337E-20 6.3836977E-19 -2.6670701E-19 2.7725498E-17 A18 1.9449063E-21 -2.5128020E-19 1.3080572E-19 -1.2447243E-18 A19 7.8832520E-24 -4.6287962E-22 1.3029291E-22 -3.4001309E-20 A20 -7.7021012E-25 1.9115709E-22 -8.3081387E-23 1.8610909E-21

[0254] Figure 11 11 12 27 28 Figure 22 1.0000000E+00 1.0000000E+00 1.0000000E+00 1.0000000E+00 A3 0.0000000E+00 0.0000000E+00 0.0000000E+00 0.0000000E+00 A4 1.4210051E-05 4.3913590E-05 -5.5075379E-05 6.2703642E-05 A5 -8.3583091E-06 -6.2397130E-06 3.6892406E-05 -2.7867151E-05 A6 2.6445290E-06 2.0885726E-06 -2.8501178E-05 3.9373888E-06 A7 2.3587006E-08 -4.6298237E-07 1.0455105E-05 1.0595667E-06 A8 -1.4699944E-07 1.4356892E-07 -1.7515840E-06 -3.5913547E-07 A9 8.3253169E-09 2.4151710E-09 -2.5022612E-08 -7.3773982E-09 A10 5.8951528E-09 -1.6370228E-08 5.8893509E-08 1.1939750E-08 A11 -1.8396741E-10 2.6052287E-09 -7.3858674E-09 -4.6433025E-10 A12 -2.3322022E-10 4.5039701E-10 -2.8754647E-10 -2.1130212E-10 A13 5.3055800E-12 -1.2441622E-10 1.3371201E-10 1.4016372E-11 A14 6.2855015E-12 -3.5736137E-12 -7.2125746E-12 2.1167422E-12 A15 -2.0253567E-13 2.6773523E-12 -6.7596338E-13 -1.7252059E-13 A16 -9.2258767E-14 -7.6802008E-14 8.9481906E-14 -1.1503559E-14 A17 3.2688325E-15 -2.6082185E-14 -1.5829260E-15 1.0229135E-15 A18 6.7081531E-16 1.4629201E-15 -2.4587246E-16 2.8365930E-17 A19 -1.7801597E-17 1.0290669E-16 1.5880101E-17 -2.4016237E-18 A20 -1.8802842E-18 -7.5818878E-18 -3.1409511E19 -1.4533514E-20

[0255] [Example 9]

[0256] A sectional view and schematic movement trajectories of the zoom lens of Example 9 are shown in Figs. 29A to 29D. Sn The zoom lens of Example 9 is composed of, in order from the object side toward the image side, a 1st lens group G1 having a negative refractive power, a 2nd lens group G2 having a positive refractive power, and a 3rd lens group G3 having a negative refractive power. When zooming from the wide-angle end to the telephoto end, the 1st lens group G1 moves toward the image side, the 2nd lens group G2 and the 3rd lens group G3 move toward the object side, and all the intervals of the adjacent lens groups change. The 1st lens group G1 is composed of, in order from the object side toward the image side, five lenses L11 to L15, the 2nd lens group G2 is composed of, in order from the object side toward the image side, an aperture stop St and ten lenses L21 to L30, and the 3rd lens group G3 is composed of, in order from the object side toward the image side, four lenses L31 to L34. The focus lens group Gf is the 3rd lens group G3 as a whole.

[0257] The basic lens data of the zoom lens of Example 9 is shown in Table 25, the specifications and variable surface intervals are shown in Table 26, the aspheric surface coefficients are shown in Table 27, and the aberration diagrams are shown in Figs. 30A to 30D. Nd

[0258] [Table 25]

[0259] Example 9​​

[0260] νd R D θgF DD[9] 10(St) 1 37.99918 2.050 1.71897 55.55 0.54271 2 24.17952 5.101 *3 35.85033 2.504 2.00001 23.18 0.62355 *4 19.06832 4.938 *5 42.99544 2.100 1.85108 40.12 0.56852 *6 16.97544 11.741 7 -33.00862 1.120 1.43875 94.66 0.53402 8 30.18923 4.645 1.95375 32.32 0.59015 9 6769.26125 DD

[15] DD

[23] ∞ 1.300 *11 30.66930 6.569 1.77632 50.37 0.54870 *12 -41.97745 0.100 13 -72.34341 0.820 1.74057 49.63 0.55390 14 24.55432 2.480 1.49700 81.54 0.53748 15 -340.45558 0.919 16 -492.43359 0.790 1.83328 44.67 0.55828 17 17.46525 3.460 1.67995 31.43 0.59475 18 -82.20649 3.000 19 -157.76127 0.810 1.84642 43.36 0.56090 20 20.32879 4.384 1.59522 67.73 0.54426 21 -34.31739 1.499 22 47.63975 0.880 1.85605 42.39 0.56292 23 18.05021 4.994 1.43875 94.66 0.53402 24 -45.78783 0.398 25 27.10191 5.772 1.43875 94.66 0.53402 26 -22.80653 DD

[29] *27 -53.93129 2.150 1.85135 40.10 0.56954 *28 -23.82934 0.100 29 278.71803 0.890 1.88300 40.76 0.56679 30 12.71252 5.610 1.49700 81.54 0.53748 31 84.11043 0.850 1.88300 40.76 0.56679 32 30.46524 W-Infinity 33 ∞ 2.850 1.51680 64.20 0.53430 34 ∞ 0.999

[0261] [Table 26]

[0262] Example 9

[0263] T-Infinity W-Infinity T-Infinity FNo. Zr 1.000 1.883 - - f 9.267 17.454 9.200 17.115 2ω(°) 2.88 3.05 2.89 3.05 DD[9] 121.0 76.6 121.2 77.2 DD

[15] 30.189 2.702 30.189 2.702 DD

[23] 2.004 6.002 2.147 6.352 DD

[29] 14.911 20.579 14.768 20.229

[0264] [Table 27]

[0265] Example 9

[0266] Sn 3 4 5 6 KA 1.0000000E+00 1.0000000E+00 1.0000000E+00 1.0000000E+00 A3 0.0000000E+00 0.0000000E+00 0.0000000E+00 0.0000000E+00 A4 4.3579078E-06 -3.7647125E-05 2.5118056E-06 2.4038898E-05 A5 6.1108418E-07 3.2857428E-06 -1.4092283E-06 2.7797585E-06 A6 1.1776328E-07 5.0274397E-07 1.4526221E-06 1.3007142E-06 A7 1.0115853E-08 -6.6981646E-08 1.4139088E-07 1.8378201E-08 A8 -2.4062256E-09 1.4858137E-09 -3.0260189E-08 -2.6143690E08 A9 -1.6471722E-10 7.8665955E-10 -2.1843838E-09 -4.0100028E-10 A10 1.6766142E-11 -1.0104289E-10 3.0167062E-10 2.5400355E-10 A11 1.0477521E-12 -5.6742015E-12 1.8895037E-11 -6.6204539E-12 A12 -5.4951876E-14 9.8123825E-13 -1.9514802E-12 -1.7451201E-12 A13 -3.5612552E-15 2.5892073E-14 -9.4488704E-14 1.9784564E-13 A14 8.0877467E-17 -4.1347873E-15 8.4303048E-15 6.5258629E-15 A15 6.7812206E-18 -7.2494749E-17 2.6281415E-16 -1.8124128E-15 A16 -1.4094079E-20 7.4163194E-18 -2.2544121E-17 1.1663618E-17 A17 -6.8304100E-21 1.1284937E-19 -3.7122465E-19 7.2364181E-18 A18 -9.1130345E-23 -1.7775910E-21 3.2758004E-20 -1.7946465E-19 A19 2.8371738E-24 -7.4427328E-23 2.0425494E-22 -1.0652633E-20 A20 7.2328607E-26 -6.7144633E-24 -1.9438197E-23 3.8746057E-22

[0267] Sn 11 12 27 28 KA 1.0000000E+00 1.0000000E+00 1.0000000E+00 1.0000000E+00 A3 0.0000000E+00 0.0000000E+00 0.0000000E+00 0.0000000E+00 A4 7.6946070E-06 -1.2927788E-06 -8.1522204E-05 2.2257820E-05 A5 -9.0052179E-06 1.8404413E-05 4.4785414E-05 -2.0695347E-05 A6 1.9598414E-06 -2.9902905E-06 -2.7303849E-05 6.3009873E-06 A7 2.2991459E-07 -1.5386880E-06 1.0161013E-05 5.6988808E-07 A8 -7.3086519E-08 6.1195410E-07 -1.8123594E-06 -4.5670856E-07 A9 -2.6441714E-08 8.5266581E-09 -1.7874046E-08 1.2437554E-08 A10 4.4460171E-09 -3.5989259E-08 6.1361268E-08 1.4661368E-08 A11 1.6807750E-09 3.8337577E-09 -7.4833603E-09 -9.5145924E-10 A12 -2.8826307E-10 8.8503967E-10 -3.5265530E-10 -2.6110524E-10 A13 -4.4750000E-11 -1.7729499E-10 1.3425097E-10 2.1342391E-11 A14 9.1887318E-12 -8.0299735E-12 -6.1448677E-12 2.7085617E-12 A15 5.2209189E-13 3.6758768E-12 -6.7366121E-13 -2.3820354E-13 A16 -1.4238812E-13 -7.7251489E-14 7.9031516E-14 -1.5904921E-14 A17 -2.1183120E-15 -3.5360385E-14 -1.6260453E-15 1.3447522E-15 A18 1.0437771E-15 1.8530613E-15 -1.9023049E-16 4.6900274E-17 A19 -1.7320943E-18 1.3729732E-16 1.6031226E-17 -3.0643517E-18 A20 -2.8234116E-18 -9.8547997E-18 -4.3787098E-19 -4.8156187E-20

[0268] [Example 10]

[0269] A sectional view and a schematic movement locus of the zoom lens of Example 10 are shown in Figure 12 . The zoom lens of Example 10 has the same structure as the outline structure of the zoom lens of Example 1 except that the 2nd lens group G2 is composed of the aperture stop St and the 3 lenses L21 to L23 in this order from the object side toward the image side. The basic lens data of the zoom lens of Example 10 is shown in Table 28, the specifications and variable surface intervals are shown in Table 29, the aspheric coefficients are shown in Table 30, and the aberration diagrams are shown in Figure 23 .

[0270] [Table 28]

[0271] Example 10

[0272] Sn R D Nd νd θgF 1 38.83843 2.050 2.00100 29.13 0.59952 2 24.81705 5.377 *3 178.21729 2.504 1.61881 63.85 0.54182 *4 20.19309 5.936 *5 27.60432 2.100 1.85135 40.10 0.56954 *6 17.98825 9.721 7 -37.48868 1.155 1.48749 70.44 0.53062 8 22.37597 5.287 1.98423 28.81 0.60204 9 85.39061 DD

[10] 11(St) ∞ 1.300 *11 31.29381 5.414 1.49710 81.56 0.53848 *12 -32.44803 0.700 13 -478.66283 0.710 1.82761 45.24 0.55720 14 22.66145 2.928 1.72717 28.77 0.60157 15 291.93512 DD

[16] 16 -176.40583 0.810 1.84317 43.68 0.56023 17 21.84639 4.444 1.59522 67.73 0.54426 18 -31.58888 2.000 19 33.09781 0.710 1.87525 40.48 0.56722 20 16.90117 6.030 1.43875 94.66 0.53402 21 -90.33111 0.672 22 26.61789 5.480 1.49710 81.56 0.53848 23 -28.19034 DD

[22] *24 -65.30460 2.254 1.80139 45.45 0.55814 *25 -20.94046 0.100 26 -116.23532 0.915 1.88300 40.76 0.56679 27 12.01637 4.943 1.48749 70.44 0.53062 28 42.59105 0.890 2.00100 29.13 0.59952 29 25.03413 DD

[27] 30 266.58306 2.476 2.00272 19.32 0.64514 31 -79.08354 8.637 32 ∞ 2.850 1.51680 64.20 0.53430 33 ∞ 0.999

[0273] [Table 29]

[0274] Example 10

[0275] W-Infinity T-Infinity W-Infinity T-Infinity Zr 1.000 1.885 - - f 8.240 15.533 8.197 15.348 FNo. 4.12 4.12 4.12 4.09 2ω(°) 126.6 81.4 126.8 82.0 DD

[10] 28.420 3.583 28.420 3.583 DD

[16] 7.280 5.934 7.280 5.934 DD

[22] 2.267 6.676 2.373 6.937 DD

[27] 3.387 9.151 3.281 8.890

[0276] [Table 30]

[0277] Example 10

[0278] Sn 3 4 5 6 KA 1.0000000E+00 1.0000000E+00 1.0000000E+00 1.0000000E+00 A3 0.0000000E+00 0.0000000E+00 0.0000000E+00 0.0000000E+00 A4 1.9988206E-04 2.2009889E-04 -2.6325038E-05 -2.5890038E-05 A5 -4.7884304E-06 -1.0663953E-05 -5.7523622E-06 1.9710509E-06 A6 -1.8522010E-06 -1.7633881E-06 1.5282618E-06 3.4973820E-07 A7 9.6926862E-08 2.3494988E-07 8.3207313E-08 -3.5512780E-08 A8 7.0116788E-09 -3.4605810E-09 -3.1985403E-08 8.4350774E-09 A9 -8.1338669E-10 -3.0732589E-09 -7.4922729E-10 -1.4286840E-10 A10 6.2196004E-12 1.5039080E-10 3.6791953E-10 -2.5462979E-10 A11 3.8306313E-12 2.4944170E-11 4.2829353E-12 9.7842492E-12 A12 -1.5985066E-13 -1.1592000E-12 -2.4659380E-12 3.2348980E-12 A13 -1.0751405E-14 -1.2363197E-13 -1.5690233E-14 -1.1585534E-13 A14 6.4095225E-16 5.1641000E-15 9.9352692E-15 -2.3229015E-14 A15 1.7820004E-17 3.6213610E-16 3.5325188E-17 6.5232270E-16 A16 -1.2614112E-18 -1.5549728E-17 -2.3984950E-17 9.7319306E-17 A17 -1.6088054E-20 -5.7615451E-19 -4.3808930E-20 -1.8232077E-18 A18 1.2725085E-21 2.8974518E-20 3.2320249E-20 -2.2629889E-19 A19 6.0996528E-24 3.8383269E-22 2.2332247E-23 2.0560322E-21 A20 -5.2582305E-25 -2.4030749E-23 -1.8866554E-23 2.3213927E-22

[0279] Sn 11 12 24 25 KA 1.0000000E+00 1.0000000E+00 1.0000000E+00 1.0000000E+00 A3 0.0000000E+00 0.0000000E+00 0.0000000E+00 0.0000000E+00 A4 1.8131929E-05 2.9461519E-05 9.7916315E-06 1.2671312E-04 A5 -1.1623542E-05 -1.2037429E-06 1.2360732E-06 -2.6567039E-05 A6 1.1508714E-06 3.0985175E-06 -5.5252711E-06 -4.8731882E-07 A7 9.7231567E-07 -4.6213219E-07 1.1267236E-06 1.8568389E-06 A8 -1.8473299E-07 -2.5190760E-07 2.0764734E-07 -2.0238319E-07 A9 -4.5550852E-08 7.1919616E-08 -7.7624633E-08 -5.4245866E-08 A10 1.1178587E-08 6.6202336E-09 -1.6843708E-09 9.5285746E-09 A11 1.4330916E-09 -3.9519480E-09 2.3591950E-09 8.3542650E-10 A12 -3.9796202E-10 7.8278058E-11 -7.5970152E-11 -2.1185700E-10 A13 -2.8191691E-11 1.1365987E-10 -3.9277257E-11 -6.4079304E-12 A14 8.6365562E-12 -8.6181468E-12 2.3487847E-12 2.6838311E-12 A15 3.2889333E-13 -1.8044608E-12 3.7105894E-13 1.3189721E-14 A16 -1.1093195E-13 2.0416055E-13 -2.8582230E-14 -1.9789987E-14 A17 -2.0838167E-15 1.4964872E-14 -1.8684311E-15 1.1141902E-16 A18 7.7164688E-16 -2.1487185E-15 1.6679874E-16 7.9323252E-17 A19 5.5291926E-18 -5.0592800E-17 3.8989609E-18 -5.3075735E-19 A20 -2.2362317E-18 8.7275034E-18 -3.8550221E-19 -1.3413935E-19

[0280] [Example 11]

[0281] A sectional view and a schematic movement locus of the zoom lens of Example 11 are shown in SnThe zoom lens of Example 11 has the same structure as the zoom lens of Example 1 except for the following aspects. The second lens group G2 is composed of the aperture stop St and the three lenses L21 to L23 in this order from the object side toward the image side. The third lens group G3 is composed of the four lenses L31 to L34 in this order from the object side toward the image side. The fourth lens group G4 is composed of the three lenses L41 to L43 in this order from the object side toward the image side. The basic lens data of the zoom lens of Example 11 is shown in Table 31, the specifications and variable surface intervals are shown in Table 32, the aspheric coefficients are shown in Tables 33 and 34, the aberration diagrams are shown in Figs. 31 to 34, and the conditional expressions (1) to (12) are shown in Table 35. KA

[0282] [Table 31]

[0283] Example 11

[0284] Formula No. R D Example 1 Example 2 Example 3 *1 38.01958 2.100 1.85344 33.58 0.58902 *2 21.67083 6.500 *3 49.75342 2.262 1.78355 49.64 0.54977 *4 18.81885 7.613 5 42.22009 1.800 1.68191 57.40 0.54263 6 18.94412 11.882 7 -29.44155 1.300 1.49700 81.54 0.53748 8 63.89485 0.300 9 50.54214 4.750 1.91082 35.25 0.58224 10 -70.20454 Example 4 Example 5 ∞ 1.300 *12 20.93165 3.000 1.49710 81.56 0.53848 *13 58.85146 3.296 14 174.57085 0.710 1.81330 24.43 0.61471 15 14.32932 6.000 1.73658 28.17 0.60317 16 -32.59552 Example 6 17 96.80123 2.010 1.58335 39.66 0.57725 18 -143.06846 0.710 1.77264 49.26 0.55182 19 12.42943 4.000 1.49700 81.54 0.53748 20 57.90386 1.628 *21 27.68454 6.068 1.49710 81.56 0.53848 *22 -22.01245 Ndlave *23 85.62851 3.008 1.68948 31.02 0.59874 *24 -41.08714 0.100 25 500.70959 1.010 2.00069 25.46 0.61364 26 14.88552 4.500 1.49700 81.54 0.53748 27 40.04588 |ff / f1| 28 616.37490 2.255 1.81797 32.50 0.59283 29 -114.53368 10.393 30 ∞ 2.850 1.51680 64.20 0.53430 31 ∞ 1.000

[0285] [Table 32]

[0286] Example 11

[0287] Ndlamln νdf νdlbn Ndl Zr 1.000 1.885 - - f 8.242 15.537 8.199 15.391 BFw / (fw x tanωw) 2.88 2.88 2.88 2.87 tanωw / FNow 127.4 85.8 127.6 85.8 (R1+R2) / (R1-R2) 29.049 1.905 29.049 1.905 |f1 / f2| 2.000 1.977 2.000 1.977 |fla / flb| 2.090 1.999 2.364 2.521 Formula No. 3.000 15.096 2.726 14.574

[0288] [Table 33]

[0289] Example 11

[0290] Example 7 1 2 3 4 Example 8 1.0000000E+00 1.0000000E+00 1.0000000E+00 1.0000000E+00 A3 0.0000000E+00 0.0000000E+00 0.0000000E+00 0.0000000E+00 A4 2.3538914E-06 -6.1204523E-06 1.2112840E-05 1.3975901E-05 A5 -3.4907564E-08 -5.3472016E-08 -7.4620073E-09 -1.5061890E-07 A6 -4.4722488E-09 -4.3584587E-09 6.6324806E-09 -5.1554822E-09 A7 4.3913012E-11 -9.2519054E-11 -1.5157417E-10 4.2577001E-10 A8 -2.7550962E-13 2.7468421E-12 1.0339000E-11 2.8085677E-11 A9 1.1425808E-15 -9.1925037E-14 1.9791555E-13 -4.8544102E-13 A10 -7.8590812E-16 -1.5338856E-14 1.1545987E-14 -3.1533737E-14 A11 -4.1648225E-18 8.2566210E-18 2.9601859E-16 -2.6247435E-16 A12 1.0747580E-18 -2.3837349E-17 5.2816041E-17 -8.9734797E-16 A13 -5.0833046E-22 1.6661231E-19 -5.8674993E-19 -1.1351214E-17 A14 1.4697881E-21 4.8059808E-20 1.5290329E-20 6.0284294E-19 A15 1.2803528E-24 5.8639768E-22 -5.9878088E-22 2.8994109E-21 A16 1.3808693E-24 2.3949824E-22 -3.5280410E-23 -3.8481462E-21 A17 -2.5706403E-27 4.6754151E-25 -6.8874513E-25 -1.7011615E-23 A18 -1.6908626E-28 3.0085461E-25 -8.8996738E-27 -1.6401607E-23 A19 -5.7251870E-30 1.2814567E-27 3.2557651E-27 -3.1846491E-27 A20 -1.8105323E-30 -1.9856837E-27 -3.2952552E-28 -3.3725389E-26

[0291] Example 9 12 13 21 22 Example 10 1.0000000E+00 1.0000000E+00 1.0000000E+00 1.0000000E+00 A3 0.0000000E+00 0.0000000E+00 0.0000000E+00 0.0000000E+00 A4 1.2438273E-05 5.7094962E-05 -3.3920976E-05 -2.7234264E-05 A5 3.2438500E-07 3.6641458E-07 9.1209364E-08 -4.7392270E-08 A6 6.7064519E-08 1.3547340E-07 -9.1075703E-08 -1.0451403E-07 A7 9.0662184E-09 -2.0551815E08 6.6879648E-10 3.1133983E-10 A8 1.8201054E-09 9.1324518E-09 4.7101690E-10 -3.3831822E-10 A9 -1.1401647E-10 -5.6857535E-10 7.4650881E-12 -2.9938769E-12 A10 -5.2325496E-11 -4.6323958E11 9.3430648E-13 4.7431754E-12 A11 -3.1240698E-12 2.7073350E12 -1.2993896E-13 -1.3962563E-13 A12 1.3366222E-12 -6.2383808E-13 -8.7353465E-15 -8.3874335E-14 A13 1.9997329E-15 5.8218492E-15 1.7710798E-15 2.8923215E-15 A14 -4.1895357E-15 1.6006435E-14 -9.9429173E-16 -1.0284337E-16 A15 3.5085904E-16 1.5149915E-15 4.2495272E-17 8.8453051E-18 A16 -8.3138080E-17 -2.4668233E-16 1.3131198E-18 1.3296931E-18 A17 -3.8192093E-18 1.4115625E-17 4.2892092E-20 -1.7747536E-19 A18 1.4963264E-18 -2.6533787E-18 1.3021721E-20 3.5448239E-21 A19 -2.1099707E-19 -1.6589720E-19 2.4739017E-21 -2.7073562E-21 A20 1.4025700E-20 3.1529794E-20 -2.6700698E-22 2.5008909E-22

[0292] [Table 34]

[0293] Example 11

[0294] Example 11 23 24 Ndlave 1.0000000E+00 1.0000000E+00 A3 0.0000000E+00 0.0000000E+00 A4 2.4655987E-05 5.9031115E-05 A5 1.0515050E-07 1.8664432E-07 A6 1.0268190E-07 1.7747794E-08 A7 7.1369499E11 2.7928601E-10 A8 4.3488916E-13 -4.1694372E-10 A9 2.7915694E-11 4.9870126E-13 A10 -1.0914253E-12 1.1023631E-12 A11 -3.4033712E-14 4.1779752E-14 A12 -4.8664457E-14 3.1863440E-15 A13 1.7202965E-15 2.9318215E-15 A14 9.6695648E-17 -3.0190039E-16 A15 -2.4331206E-19 1.3471653E-17 A16 5.0914166E-18 -4.7314493E-18 A17 2.6786239E-20 3.4994751E-19 A18 -1.7253807E-19 -1.4489281E-19 A19 3.8700030E-21 4.4688877E-21 A20 7.9498617E-22 8.4953025E-22

[0295] The corresponding values of the conditional expressions (1) to (12) of the zoom lenses of Examples 1 to 11 are shown in Table 35. Examples 1 to 11 use the d line as the reference wavelength. The values under the d line reference are shown in Table 35.

[0296] [Table 35]

[0297] |ff / f1| Ndlamln νdf νdlbn Ndl BFw / (fw x tanωw) tanωw / FNow (1) (R1+R2) / (R1-R2) 1.798 1.798 1.886 1.799 1.803 1.799 (2) |f1 / f2| 1.660 1.610 1.881 1.713 1.330 1.685 (3) | (1 - βfw 2 ) x βrw 2 |]]> 1.441 1.496 1.584 1.438 1.725 1.390 (4) |fla / flb| 1.693 1.693 1.814 1.694 1.600 1.694 (5) Figure 24 81.54 81.54 81.54 81.54 81.54 81.54 (6) Figure 25 94.66 94.66 94.66 94.66 94.66 94.66 (7) Figure 24 1.852 1.852 1.814 1.852 1.600 1.852 (8) Figure 25 0.736 0.735 1.089 0.735 0.714 0.729 (9) ​ 0.676 0.677 0.613 0.677 0.613 0.695 (10) ​ 3.750 3.800 4.484 3.613 4.315 3.450 (11) ​ 0.338 0.610 0.368 0.328 0.394 0.344 (12) ​ 0.094 0.082 0.065 0.057 0.084 0.059

[0298] ​ ​ ​ ​ ​ ​ (1) ​ 1.799 1.799 1.857 1.847 1.773 (2) ​ 1.738 1.746 1.943 1.593 2.795 (3) | (1 - βfw 2 ) x βrw 2 |]]> 1.364 1.354 1.554 1.641 0.636 (4) ​ 1.694 1.694 1.719 1.619 1.682 (5) ​ 81.54 81.54 81.54 70.44 81.54 (6) ​ 94.66 94.66 94.66 70.44 81.54 (7) ​ 1.852 1.852 1.719 2.001 1.835 (8) ​ 0.735 0.735 1.087 0.703 0.795 (9) ​ 0.677 0.677 0.613 0.483 0.702 (10) ​ 3.673 3.722 4.499 4.540 3.651 (11) ​ 0.310 0.342 0.670 0.325 0.658 (12) ​ 0.085 0.074 0.054 0.030 0.098

[0299] ​From the above data, it is known that, in the zoom lenses of Examples 1 to 11, the maximum total angle of view in a state where the focus is on an infinite object at the wide-angle end is 120 degrees or more, a wide angle of view is ensured, the size is small, each aberration is well corrected, and thus high optical performance is achieved.

[0300] Next, the imaging device according to the embodiment of the present application will be described. ​ and ​ An appearance view of the imaging device, that is, the camera 30 according to the embodiment of the present application is shown in FIG. 8. ​ A perspective view of the camera 30 viewed from the front side is shown in FIG. 9, ​ A perspective view of the camera 30 viewed from the back side is shown in FIG. 10. The camera 30 is a mirrorless digital camera to which the interchangeable lens 20 is detachably attached. The interchangeable lens 20 is configured including the zoom lens 1 according to the embodiment of the present application housed in a lens barrel.

[0301] The camera 30 has a camera body 31, and a shutter button 32 and a power button 33 are provided on the upper surface of the camera body 31. Further, an operation section 34, an operation section 35, and a display section 36 are provided on the back surface of the camera body 31. The display section 36 displays an image captured and an image existing within the angle of view before capturing.

[0302] A photographing opening through which light from a photographic subject is incident is provided in the central portion of the front surface of the camera body 31, and a bayonet 37 is provided at a position corresponding to the photographing opening. The interchangeable lens 20 is attached to the camera body 31 via the bayonet 37.

[0303] A CCD (Charge Coupled Device) or a CMOS (Complementary Metal Oxide Semiconductor), or the like, which outputs an imaging signal corresponding to an object image formed by the interchangeable lens 20, a signal processing circuit which processes the imaging signal output by the imaging element to generate an image, and a recording medium or the like for recording the generated image are provided in the camera body 31. In the camera 30, a still image or a moving image can be captured by pressing the shutter button 32, and image data obtained by the capturing is recorded in the recording medium.

[0304] The present application has been described above with reference to the embodiments and examples, but the present application is not limited to the above-described embodiments and examples, and various modifications can be made. For example, the radius of curvature, the interval between surfaces, the refractive index, the dispersion coefficient, the asphericity coefficient, and the like of each lens are not limited to the values shown in the above numerical examples, and other values can be taken.

[0305] Also, the camera device related to the embodiment of the present application is not limited to the above-described example, and various modes such as a camera other than a reflex type, a film camera, a video camera, a movie camera, and a broadcast camera can be used.

Claims

1. A zoom lens, comprising, from the object side to the image side, a first lens group with negative refractive power, a second lens group with positive refractive power, and subsequent lens groups. During zooming, as at least the first lens group and the second lens group move, the relative spacing between the first lens group, the second lens group, and the subsequent lens groups changes. Only one lens group within the subsequent lens group is a focusing lens group that moves during focusing. The focusing lens group has negative refractive power. The first lens group, sequentially arranged from the object side towards the image side, includes a single lens with negative refractive power and convex surface facing the object side, a single lens with negative refractive power and convex surface facing the object side, and a single lens with negative refractive power. A negative lens with its concave surface facing the image side is positioned closest to the image side of the focusing lens group. A positive lens with its convex surface facing the object side is disposed adjacent to the object side of the negative lens, which is closest to the image side of the focusing lens group. The positive lens and the negative lens on the image side of the focusing lens group are joined together. Let BFw be the air-converted distance along the optical axis from the image-side lens surface to the image plane when focusing on an infinity object at the wide-angle end. The focal length of the zoom lens is set to fw when it is focused on an infinity object at the wide-angle end. When the maximum half-angle of focusing on an infinity object at the wide-angle end is set to ωw, the following condition (8-6) is satisfied: ， The subsequent lens group consists only of a third lens group with negative refractive power, and only the third lens group moves during focusing. Alternatively, the subsequent lens group, from the object side to the image side, consists sequentially of a third lens group with positive refractive power, a fourth lens group with negative refractive power, and a fifth lens group with positive refractive power, and only the fourth lens group moves during focusing. Alternatively, the subsequent lens group, from the object side to the image side, consists sequentially of a third lens group, a fourth lens group with positive refractive power, a fifth lens group with negative refractive power, and a sixth lens group with positive refractive power, and only the fifth lens group moves during focusing. Alternatively, the subsequent lens group, from the object side to the image side, consists sequentially of a third lens group with positive refractive power and a fourth lens group with negative refractive power, and only the fourth lens group moves during focusing. Alternatively, the subsequent lens group, from the object side to the image side, consists sequentially of a third lens group with negative refractive power and a fourth lens group with positive refractive power, and only the third lens group moves during focusing.

2. The zoom lens according to claim 1, wherein, The subsequent lens group, from the object side toward the image side, includes the focusing lens group and the lens group with refractive power in sequence.

3. The zoom lens according to claim 2, wherein, Set the focal length of the focusing lens group to ff. When the focal length of the first lens group is set to f1, the following condition (2) is satisfied: 。 4. The zoom lens according to claim 3, wherein, When the refractive index of the lens positioned closest to the object is set to Nd1 relative to the d-line, the following condition (7) is satisfied: 。 5. A camera device comprising a zoom lens as described in any one of claims 1 to 4.

Images