Large-format zoom movie lens and image pickup device

Abstract

The invention discloses a large-format zoom movie lens. The large-format zoom movie lens sequentially comprises a first fixed group with negative focal power, a focusing group with positive focal power, a second fixed group with positive focal power, a zoom group with negative focal power, a diaphragm and a third fixed group with positive focal power from an object side to an image side, the zoom group can move along the optical axis based on user requirements; in the focusing process, the focusing group moves along the optical axis, and the first fixing group, the second fixing group, the zooming group and the third fixing group remain unchanged relative to the image plane position. According to the technical scheme, the above structural design is adopted, zooming is carried out through the zooming set, the zooming magnification can be improved, the imaging quality of different focal lengths of a large target surface can be guaranteed, the optical performance of the lens is stabilized through the multiple fixing sets, clear and high-quality imaging is provided, the focusing set can change the position of the lens to achieve focusing, objects different in distance can be clearly presented, and the imaging quality is improved. And the zoom effect is realized. The invention also provides an image pickup device.

Description

Technical Field

[0001] This application relates to the technical field of photographic lenses, and particularly relates to a large-format zoom movie lens and an image pickup device. Background Art

[0002] Existing large-variation zoom lenses for photography cannot achieve parfocalization at different focal lengths. That is, when using a photographic lens, when the field of view is enlarged or reduced, it is necessary to refocus to find the focus.

[0003] Movie lenses enable consumers to lock the focus on the subject during use, and can enlarge or reduce the scene without refocusing; however, existing variable magnification movie lenses have the problem of a small target surface within the same focal length range, thereby affecting the photographic effect. Summary of the Invention

[0004] This application provides a large-format zoom movie lens and an image pickup device, aiming to solve the problem that existing variable magnification movie lenses have a small target surface within the same focal length range.

[0005] To achieve the above object, this application proposes a large-format zoom movie lens, which sequentially includes a first fixed group with negative optical power, a focusing group with positive optical power, a second fixed group with positive optical power, a variable magnification group with negative optical power, a diaphragm, and a third fixed group with positive optical power from the object side to the image side;

[0006] The variable magnification group can move along the optical axis based on user needs;

[0007] During the focusing process, the focusing group moves along the optical axis, and the first fixed group, the second fixed group, and the third fixed group remain unchanged with respect to the position of the image plane.

[0008] In some embodiments, the first fixed group is a first lens group, and the first lens group sequentially includes a first lens with negative optical power, a second lens with negative optical power, and a third lens with positive optical power from the object side to the image side;

[0009] Wherein, the second lens and the third lens are cemented.

[0010] In some embodiments, the focusing group is a second lens group, and the second lens group satisfies the following conditional formula:

[0011] 0.5 < F2 / L < 0.7;

[0012] In the formula, F2 is the focal length of the second lens group, and L is the total length from the first lens near the object side of the lens to the image plane.

[0013] In some embodiments, the second lens group sequentially includes, from the object side to the image side, a fourth lens with positive optical power, a fifth lens with negative optical power, and a sixth lens with positive optical power, and the fifth lens and the sixth lens are cemented; or,

[0014] the second lens group sequentially includes, from the object side to the image side, a fourth lens with positive optical power, a fifth lens with negative optical power, and a sixth lens with positive optical power; or,

[0015] the second lens group sequentially includes, from the object side to the image side, a cemented lens with negative optical power and a sixth lens with positive optical power.

[0016] In some embodiments, at least one lens with Abbe number Vd>60 is included in the second lens group.

[0017] In some embodiments, the second fixed group is a third lens group, and the third lens group includes a seventh lens with positive optical power.

[0018] In some embodiments, the zoom group includes multiple lens groups, and the zoom group satisfies the following conditional formula:

[0019] 1.2 < |F4| / Fw < 3.0;

[0020] In the formula, F4 is the combined focal length of the zoom group, and Fw is the focal length of the wide-angle end of the lens.

[0021] In some embodiments, the zoom group sequentially includes, from the object side to the image side, a fourth lens group, a fifth lens group, and a sixth lens group;

[0022] wherein, at least one of the fourth lens group, the fifth lens group, and the sixth lens group has negative optical power.

[0023] In some embodiments, the fourth lens group includes a cemented lens with positive optical power and a singlet lens with positive optical power; or,

[0024] the fourth lens group includes a singlet lens with positive optical power.

[0025] In some embodiments, the fourth lens group sequentially includes, from the object side to the image side, an eighth lens with negative optical power, a ninth lens with positive optical power, and a tenth lens with positive optical power;

[0026] wherein, the eighth lens and the ninth lens are cemented, or the ninth lens and the tenth lens are cemented.

[0027] In some embodiments, the fourth lens group sequentially includes, from the object side to the image side, an eighth lens with positive optical power, a ninth lens with negative optical power, and a tenth lens with positive optical power;

[0028] Wherein, the eighth lens and the ninth lens are cemented together.

[0029] In some embodiments, the fifth lens group sequentially includes a lens unit with negative optical power, a thirteenth lens with negative optical power, and a fourteenth lens with positive optical power from the object side to the image side.

[0030] In some embodiments, the lens unit with negative optical power sequentially includes an eleventh lens with negative optical power and a twelfth lens with negative optical power from the object side to the image side; or,

[0031] The lens unit with negative optical power sequentially includes an eleventh lens with negative optical power and a twelfth lens with negative optical power from the object side to the image side, and the eleventh lens and the twelfth lens are cemented together.

[0032] In some embodiments, the sixth lens group includes a fifteenth lens with positive optical power and a sixteenth lens with positive optical power; or,

[0033] The sixth lens group includes a fifteenth lens with positive optical power and a sixteenth lens with negative optical power; or,

[0034] The sixth transmissive lens group sequentially includes a fifteenth lens with negative optical power, a sixteenth lens with positive optical power, a seventeenth lens with positive optical power, and an eighteenth lens with negative optical power from the object side to the image side, wherein the fifteenth lens and the sixteenth lens are cemented together; or,

[0035] The sixth transmissive lens group sequentially includes a sixteenth lens with positive optical power, a seventeenth lens with positive optical power, and an eighteenth lens with negative optical power from the object side to the image side.

[0036] In some embodiments, the zoom group further includes a seventh lens with positive optical power, and the seventh lens is disposed on a side of the sixth lens away from the fifth lens.

[0037] In some embodiments, the seventh lens group sequentially includes a nineteenth lens with positive optical power and a twentieth lens with negative optical power from the object side to the image side; or,

[0038] The seventh lens group sequentially includes a nineteenth lens with positive optical power, a twentieth lens with negative optical power, and a singlet lens with positive optical power from the object side to the image side; or

[0039] The seventh lens group sequentially includes a nineteenth lens with positive optical power, a twentieth lens with negative optical power, and a singlet lens with positive optical power from the object side to the image side; the twentieth lens and the singlet lens are cemented together.

[0040] In some embodiments, the third fixed group is the eighth lens group, and the eighth lens group satisfies the conditional formula:

[0041] 2 < F8 / Fw < 4.8;

[0042] 0.2 < F8 / Fl < 0.9;

[0043] In the formula, F8 is the focal length of the eighth lens group, Fw is the focal length at the wide-angle end, and Fl is the focal length at the telephoto end.

[0044] In some embodiments, the eighth lens group sequentially includes a twenty-first lens with a positive refractive power, a twenty-second lens with a positive refractive power, a twenty-third lens with a positive refractive power, and a twenty-fourth lens with a negative refractive power from the object side to the image side; or,

[0045] the eighth lens group sequentially includes a twenty-first lens with a positive refractive power, a twenty-second lens with a negative refractive power, a twenty-third lens with a positive refractive power, and a twenty-fourth lens with a negative refractive power from the object side to the image side; or,

[0046] the eighth lens group sequentially includes a twenty-first lens with a positive refractive power, a twenty-second lens with a positive refractive power, a twenty-third lens with a negative refractive power, a twenty-fourth lens with a positive refractive power, a twenty-fifth lens with a negative refractive power, a twenty-sixth lens with a positive refractive power, a twenty-seventh lens with a positive refractive power, a twenty-eighth lens with a negative refractive power, a twenty-ninth lens with a negative refractive power, a thirtieth lens with a positive refractive power, a thirty-first lens with a negative refractive power, and a thirty-second lens with a positive refractive power from the object side to the image side; wherein, the twenty-second lens and the twenty-third lens are cemented, the twenty-fourth lens, the twenty-fifth lens, and the twenty-sixth lens are cemented, the twenty-seventh lens and the twenty-eighth lens are cemented, the twenty-ninth lens and the thirtieth lens are cemented, and the thirty-first lens and the thirty-second lens are cemented; or,

[0047] The eighth lens group sequentially includes, from the object side to the image side, a twenty-first lens with a positive focal power, a twenty-second lens with a positive focal power, a twenty-third lens with a negative focal power, a twenty-fourth lens with a positive focal power, a twenty-fifth lens with a negative focal power, a twenty-sixth lens with a positive focal power, a twenty-seventh lens with a positive focal power, a twenty-eighth lens with a negative focal power, a twenty-ninth lens with a negative focal power, a thirtieth lens with a positive focal power, a thirty-first lens with a negative focal power, a thirty-second lens with a positive focal power, and a thirty-third lens with a negative focal power, a thirty-fourth lens with a positive focal power, a thirty-fifth lens with a negative focal power, a thirty-sixth lens with a positive focal power, and a thirty-seventh lens with a negative focal power; wherein, the twenty-second lens and the twenty-third lens are cemented, the twenty-fourth lens, the twenty-fifth lens, and the twenty-sixth lens are cemented, the twenty-seventh lens and the twenty-eighth lens are cemented, the twenty-ninth lens and the thirtieth lens are cemented, the thirty-first lens and the thirty-second lens are cemented, the thirty-sixth lens and the thirty-seventh lens are cemented; or,

[0048] The eighth lens group sequentially includes, from the object side to the image side, a twenty-first lens with a positive focal power, a twenty-second lens with a positive focal power, a twenty-third lens with a negative focal power, a twenty-fourth lens with a positive focal power, a twenty-fifth lens with a negative focal power, a twenty-sixth lens with a positive focal power, a twenty-seventh lens with a positive focal power, a twenty-eighth lens with a negative focal power, a twenty-ninth lens with a negative focal power, a thirtieth lens with a positive focal power, a thirty-first lens with a negative focal power, a thirty-second lens with a positive focal power, and a thirty-third lens with a positive focal power, a thirty-fourth lens with a negative focal power, a thirty-fifth lens with a positive focal power, a thirty-sixth lens with a negative focal power, and a thirty-seventh lens with a positive focal power, a thirty-eighth lens with a negative focal power, and a thirty-ninth lens with a positive focal power; wherein, the twenty-second lens and the twenty-third lens are cemented, the twenty-fourth lens, the twenty-fifth lens, and the twenty-sixth lens are cemented, the twenty-seventh lens and the twenty-eighth lens are cemented, the twenty-ninth lens and the thirtieth lens are cemented, the thirty-first lens and the thirty-second lens are cemented, the thirty-fifth lens and the thirty-sixth lens are cemented, the thirty-seventh lens and the thirty-eighth lens are cemented.

[0049] In some embodiments, the eighth lens group includes at least one lens with an Abbe number Vd > 60, and at least one lens with a refractive index nd > 1.8.

[0050] In some embodiments, the lens satisfies the following conditional formula:

[0051] 1.0 < Fw / H < 1.5;

[0052] 12.5 < Fl / H < 14.5;

[0053] Wherein, Fw is the focal length at the wide-angle end, Fl is the focal length at the telephoto end, and H is the semi-image height of the lens.

[0054] This application also provides an image pickup device, which includes a camera body and the large-format zoom cine lens as described above, and the camera body is detachably connected to the large-format zoom cine lens.

[0055] The technical solution of this application provides a large-format zoom cine lens, which sequentially includes a first fixed group with negative optical power, a focusing group with positive optical power, a second fixed group with positive optical power, a variable magnification group with negative optical power, a diaphragm, and a third fixed group with positive optical power from the object side to the image side; the variable magnification group can move along the optical axis based on user needs; during the focusing process, the focusing group moves along the optical axis, and the first fixed group, the second fixed group, and the third fixed group remain unchanged relative to the position of the image plane. The technical solution of this application adopts the above structural design. By varying the variable magnification group, the zoom ratio can be increased and the imaging quality at different focal lengths of the large target surface can be ensured. Multiple fixed groups help to stabilize the optical performance of the lens, providing clear and high-quality imaging. The focusing group can change its position to achieve focusing. By adjusting the position of the focusing group, objects at different distances can be clearly presented, achieving the zoom effect. This application also provides an image pickup device. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] In order to more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of this application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings, where:

[0057] Figure 1 is a schematic structural diagram of Embodiment 1 of the large-format zoom cine lens of this application;

[0058] Figure 2 is a schematic structural diagram of Embodiment 2 of the large-format zoom cine lens of this application;

[0059] Figure 3 is a schematic structural diagram of Embodiment 3 of the large-format zoom cine lens of this application. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0060] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without making creative efforts belong to the scope of protection of the present application.

[0061] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present application are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0062] It should also be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there may be an intermediate element at the same time. When an element is referred to as "connected to" another element, it can be directly connected to the other element or there may be an intermediate element at the same time.

[0063] In addition, the descriptions involving "first", "second", etc. in the present application are only for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present application.

[0064] Referring to Figure 1 and Figure 3 , the present application provides a large-format zoom movie lens, which sequentially includes a first fixed group with negative optical power, a focusing group with positive optical power, a second fixed group with positive optical power, a variable magnification group with negative optical power, a diaphragm, and a third fixed group with positive optical power from the object side to the image side; the variable magnification group can move along the optical axis based on user requirements; during the focusing process, the focusing group moves along the optical axis, and the first fixed group, the second fixed group, and the third fixed group remain unchanged in position relative to the image plane.

[0065] The technical solution of the present application adopts the above structural design. By varying the magnification of the variable magnification group, the zoom ratio can be increased and the imaging quality of different focal lengths of a large target surface can be ensured. Multiple fixed groups help to stabilize the optical performance of the lens and provide clear and high-quality imaging. The focusing group can change its position to achieve focusing. By adjusting the position of the focusing group, objects at different distances can be clearly presented, realizing the zoom effect.

[0066] Among them, the above-mentioned zoom movie lens diaphragm STO is located between the variable power group and the third fixed group. This diaphragm position can ensure that the zoom system has a constant aperture during the zooming process. Since the front aperture of the system is relatively large, placing the diaphragm at the rear can make the rear aperture of the lens smaller, effectively reducing costs.

[0067] In some embodiments, the first fixed group is the first lens group G01. The first lens group G01 sequentially includes a first lens L1 with a negative focal power, a second lens L2 with a negative focal power, and a third lens L3 with a positive focal power from the object side to the image side; among them, the second lens L2 and the third lens L3 are cemented.

[0068] In this embodiment, the first lens L1 with a negative focal power will cause the light rays to diverge, which helps to focus distant objects on the image plane. Cementing the second lens L2 with a negative focal power and the third lens L3 together, their negative focal powers will further strengthen the divergence effect of the light rays, thereby further expanding the field of view or achieving a stronger magnification effect. The third lens L3 with a positive focal power will cause the light rays to converge, and it cooperates with the first two lenses to help direct the light rays correctly and form a clear image.

[0069] In some embodiments, the focusing group is the second lens group G02, and the second lens group G02 satisfies the following conditional formula:

[0070] 0.5 < F2 / L < 0.7;

[0071] In the formula, F2 is the focal length of the second lens group G02, and L is the total length from the first lens L1 on the object side of the lens to the image plane.

[0072] In this embodiment, by setting the above conditional formula, the main consideration is the system cost problem. Specifically, exceeding the lower limit of this range will make the total length of the system too long, which is not conducive to cost reduction. Exceeding the upper limit of this range can shorten the total length of the system, but aspherical surfaces need to be introduced, which is also not conducive to cost reduction.

[0073] In some embodiments, the second lens group G02 sequentially includes a fourth lens L4 with a positive focal power, a fifth lens L5 with a negative focal power, and a sixth lens L6 with a positive focal power from the object side to the image side, and the fifth lens L5 and the sixth lens L6 are cemented (configuration one); or, the second lens group G02 sequentially includes a fourth lens L4 with a positive focal power, a fifth lens L5 with a negative focal power, and a sixth lens L6 with a positive focal power from the object side to the image side (configuration two); or, the second lens group G02 sequentially includes a cemented lens with a negative focal power and a sixth lens L6 with a positive focal power from the object side to the image side (configuration three).

[0074] In this embodiment, the second lens group G02 includes three configurations, each with its unique effects and application scenarios. Among them, Configuration 1 can enhance the converging ability of the lens, enabling light to be better focused while reducing aberration and distortion. Due to the cementing of the fifth lens L5 and the sixth lens L6, the air gap between the lenses can be eliminated, further reducing aberration. Configuration 2 does not use cementing. This configuration provides a relatively simple design and may have a lower cost. It mainly relies on the synergistic effect of the fourth, fifth, and sixth lenses L6 to correct aberration. Configuration 3 emphasizes the zoom ability of the lens, enabling the lens to obtain clear imaging of objects at different distances. Since cemented lenses are used, the air gap between the lenses can be eliminated, reducing aberration and improving the overall optical performance.

[0075] In some embodiments, the second lens group G02 includes at least one lens with an Abbe number Vd > 60.

[0076] Among them, the Abbe number is a coefficient used to measure the dispersion ability of a transparent substance, denoted by the symbol Vd. The larger the Vd, the smaller the dispersion of the lens and the higher the imaging quality. Therefore, using a lens with an Abbe number Vd > 60 can reduce dispersion, improve the imaging quality of the lens, and optimize the visual effect.

[0077] In some embodiments, the second fixed group is the third lens group G03, and the third lens group G03 includes a seventh lens L7 with a positive focal power. In this way, since the seventh lens L7 has a positive focal power, it can help focus light better and reduce aberration. This helps improve the overall optical performance of the lens and provides a clearer and more accurate image.

[0078] In some embodiments, the zoom group includes multiple lens groups, and the zoom group satisfies the following conditional formula:

[0079] 1.2 < |F4| / Fw < 3.0;

[0080] In the formula, F4 is the combined focal length of the zoom group, and Fw is the focal length of the wide-angle end of the lens.

[0081] Among them, the zoom group has a relatively large zoom range. This kind of lens with a zoom group can be applied to a variety of different application scenarios, such as news reporting, documentary shooting, movie production, etc. Whether in static or dynamic scenes, photographers can use the zoom function of this lens to capture the desired pictures.

[0082] In some embodiments, the variable magnification group sequentially includes a fourth lens group G04, a fifth lens group G05, a sixth lens group G06, and a seventh lens group G07 with positive optical power from the object side to the image side; wherein, one of the fourth lens group G04, the fifth lens group G05, and the sixth lens group G06 is a lens group with negative optical power, and the other two are lens groups with positive optical power.

[0083] In this embodiment, the variable magnification group is variably magnified by the linkage of multiple lens groups, increasing the variable magnification range of the lens. The lenses in the fourth lens group G04, the fifth lens group G05, and the sixth lens group G06 can be combined according to a specific configuration to achieve a larger zoom ratio. And at least one of the fourth lens group G04, the fifth lens group G05, and the sixth lens group G06 is a lens group with negative optical power, and the other two are lens groups with positive optical power. This configuration provides greater design flexibility and can adjust the optical power according to different requirements to optimize the imaging quality or increase the variable magnification range.

[0084] In some embodiments, the fourth lens group G04 includes a cemented lens with positive optical power and a singlet lens with positive optical power; or, the fourth lens group G04 includes a singlet lens with positive power.

[0085] Wherein, whether using a cemented lens with positive optical power or a singlet lens, the design of the fourth lens group G04 is to correct aberrations and improve the overall imaging quality to improve the imaging quality, ensure stability and reliability.

[0086] More specifically, the fourth lens group G04 sequentially includes an eighth lens L8 with negative optical power, a ninth lens L9 with positive optical power, and a tenth lens L10 with positive optical power from the object side to the image side; wherein, the eighth lens L8 is cemented to the ninth lens L9, or, the ninth lens L9 is cemented to the tenth lens L10.

[0087] In some embodiments, the fourth lens group G04 may also sequentially include an eighth lens L8 with positive optical power, a ninth lens L9 with negative optical power, and a tenth lens L10 with positive optical power from the object side to the image side; wherein, the eighth lens L8 and the ninth lens L9 are cemented.

[0088] In some embodiments, the fifth lens group G05 sequentially includes a lens unit with negative optical power, a thirteenth lens L13 with negative optical power, and a fourteenth lens L14 with positive optical power from the object side to the image side.

[0089] Wherein, by using a lens unit with negative optical power, the brightness and darkness of the picture can be reduced, and the contrast can be improved. At the same time, combined with the fourteenth lens L14 with positive optical power, the sharpness and resolution of the imaging can be further enhanced.

[0090] More specifically, the lens unit with negative optical power includes, in order from the object side to the image side, an eleventh lens L11 with negative optical power and a twelfth lens L12 with negative optical power; or, the lens unit with negative optical power includes, in order from the object side to the image side, an eleventh lens L11 with negative optical power and a twelfth lens L12 with negative optical power, and the eleventh lens L11 and the twelfth lens L12 are cemented together.

[0091] In some embodiments, the sixth lens group G06 includes a fifteenth lens L15 with positive optical power and a sixteenth lens L16 with positive optical power; or, the sixth lens group G06 includes a fifteenth lens L15 with positive optical power and a sixteenth lens L16 with negative optical power; or, the sixth transmissive lens group includes, in order from the object side to the image side, a fifteenth lens L15 with negative optical power, a sixteenth lens L16 with positive optical power, a seventeenth lens L17 with positive optical power, and an eighteenth lens L18 with negative optical power, where the fifteenth lens L15 and the sixteenth lens L16 are cemented together; or, the sixth transmissive lens group includes, in order from the object side to the image side, a sixteenth lens L16 with positive optical power, a seventeenth lens L17 with positive optical power, and an eighteenth lens L18 with negative optical power.

[0092] Among them, by using the fifteenth lens L15 and the sixteenth lens L16 with positive optical power, the brightness and contrast of the picture can be enhanced, and the resolution can be improved; the lenses with negative optical power in the lens group can be used to correct distortion and ensure the accurate geometry of the image. By reasonably configuring these lenses, distortion can be eliminated or reduced, and the imaging quality can be improved.

[0093] In some embodiments, the seventh lens group G07 includes, in order from the object side to the image side, a nineteenth lens L19 with positive optical power and a twentieth lens L20 with negative optical power; or, the seventh lens group G07 includes, in order from the object side to the image side, a nineteenth lens L19 with positive optical power, a twentieth lens L20 with negative optical power, and a singlet lens with positive optical power; or, the seventh lens group G07 includes, in order from the object side to the image side, a nineteenth lens L19 with positive optical power, a twentieth lens L20 with negative optical power, and a singlet lens with positive optical power; the twentieth lens L20 and the singlet lens are cemented together.

[0094] Similarly, these configurations of the seventh lens group G07 provide effects such as optimizing imaging quality, distortion correction, and high reliability and stability.

[0095] In some embodiments, the third fixed group is the eighth lens group G08, and the eighth lens group G08 satisfies the conditional formula:

[0096] 2 < F8 / Fw < 4.8;

[0097] 0.2 < F8 / Fl < 0.9;

[0098] Wherein, F8 is the focal length of the eighth lens group G08, Fw is the focal length at the wide-angle end, and Fl is the focal length at the telephoto end.

[0099] By satisfying this conditional expression, the eighth lens group G08 can provide clear images within different focal length ranges, enabling the lens to adapt to different shooting scenarios, including the shooting requirements at the wide-angle end and the telephoto end. A suitable focal length range helps to further correct aberrations and improve the sharpness and clarity of the imaging. Moreover, the variation in the numerical range of F8 / Fw can change the zoom range. The smaller this value, the larger the focal length, and the larger this value, the smaller the focal length.

[0100] In some embodiments, the eighth lens group G08 sequentially includes a twenty-first lens L21 with a positive refractive power, a twenty-second lens L22 with a positive refractive power, a twenty-third lens L23 with a positive refractive power, and a twenty-fourth lens L24 with a negative refractive power from the object side to the image side.

[0101] Alternatively, the eighth lens group G08 sequentially includes a twenty-first lens L21 with a positive refractive power, a twenty-second lens L22 with a negative refractive power, a twenty-third lens L23 with a positive refractive power, and a twenty-fourth lens L24 with a negative refractive power from the object side to the image side.

[0102] Alternatively, the eighth lens group G08 sequentially includes a twenty-first lens L21 with a positive refractive power, a twenty-second lens L22 with a positive refractive power, a twenty-third lens L23 with a negative refractive power, a twenty-fourth lens L24 with a positive refractive power, a twenty-fifth lens L25 with a negative refractive power, a twenty-sixth lens L26 with a positive refractive power, a twenty-seventh lens L27 with a positive refractive power, a twenty-eighth lens L28 with a negative refractive power, a twenty-ninth lens L29 with a negative refractive power, a thirtieth lens L30 with a positive refractive power, a thirty-first lens L31 with a negative refractive power, and a thirty-second lens L32 with a positive refractive power from the object side to the image side; wherein, the twenty-second lens L22 and the twenty-third lens L23 are cemented, the twenty-fourth lens L24, the twenty-fifth lens L25, and the twenty-sixth lens L26 are cemented, the twenty-seventh lens L27 and the twenty-eighth lens L28 are cemented, the twenty-ninth lens L29 and the thirtieth lens L30 are cemented, and the thirty-first lens L31 and the thirty-second lens L32 are cemented.

[0103] Alternatively, the eighth lens group G08 includes, in order from the object side to the image side, a twenty-first lens L21 with a positive focal power, a twenty-second lens L22 with a positive focal power, a twenty-third lens L23 with a negative focal power, a twenty-fourth lens L24 with a positive focal power, a twenty-fifth lens L25 with a negative focal power, a twenty-sixth lens L26 with a positive focal power, a twenty-seventh lens L27 with a positive focal power, a twenty-eighth lens L28 with a negative focal power, a twenty-ninth lens L29 with a negative focal power, a thirtieth lens L30 with a positive focal power, a thirty-first lens L31 with a negative focal power, a thirty-second lens L32 with a positive focal power, a thirty-third lens L33 with a negative focal power, a thirty-fourth lens L34 with a positive focal power, a thirty-fifth lens L35 with a negative focal power, a thirty-sixth lens L36 with a positive focal power, and a thirty-seventh lens L37 with a negative focal power; wherein, the twenty-second lens L22 and the twenty-third lens L23 are cemented, the twenty-fourth lens L24, the twenty-fifth lens L25, and the twenty-sixth lens L26 are cemented, the twenty-seventh lens L27 and the twenty-eighth lens L28 are cemented, the twenty-ninth lens L29 and the thirtieth lens L30 are cemented, the thirty-first lens L31 and the thirty-second lens L32 are cemented, and the thirty-sixth lens L36 and the thirty-seventh lens L37 are cemented.

[0104] Alternatively, the eighth lens group G08 includes, in order from the object side to the image side, a twenty-first lens L21 with a positive refractive power, a twenty-second lens L22 with a positive refractive power, a twenty-third lens L23 with a negative refractive power, a twenty-fourth lens L24 with a positive refractive power, a twenty-fifth lens L25 with a negative refractive power, a twenty-sixth lens L26 with a positive refractive power, a twenty-seventh lens L27 with a positive refractive power, a twenty-eighth lens L28 with a negative refractive power, a twenty-ninth lens L29 with a negative refractive power, a thirtieth lens L30 with a positive refractive power, a thirty-first lens L31 with a negative refractive power, a thirty-second lens L32 with a positive refractive power, a thirty-third lens L33 with a positive refractive power, a thirty-fourth lens L34 with a negative refractive power, a thirty-fifth lens L35 with a positive refractive power, a thirty-sixth lens L36 with a negative refractive power, a thirty-seventh lens L37 with a positive refractive power, a thirty-eighth lens L38 with a negative refractive power, and a thirty-ninth lens L39 with a positive refractive power; wherein, the twenty-second lens L22 and the twenty-third lens L23 are cemented, the twenty-fourth lens L24, the twenty-fifth lens L25, and the twenty-sixth lens L26 are cemented, the twenty-seventh lens L27 and the twenty-eighth lens L28 are cemented, the twenty-ninth lens L29 and the thirtieth lens L30 are cemented, the thirty-first lens L31 and the thirty-second lens L32 are cemented, the thirty-fifth lens L35 and the thirty-sixth lens L36 are cemented, and the thirty-seventh lens L37 and the thirty-eighth lens L38 are cemented. The complex lens group provides effects such as high contrast and resolution, distortion correction, and high reliability and stability for the lens.

[0105] In some embodiments, the eighth lens group G08 includes at least one lens with an Abbe number Vd > 60, and at least one lens with a refractive index nd > 1.8.

[0106] Among them, using a lens with an Abbe number Vd > 60 and using a lens with a refractive index nd > 1.8 helps to further correct aberrations, improve the clarity and resolution of imaging. These lenses have better optical performance, can focus light better, and produce clearer images. Among them, the high refractive index lenses can make the entire lens group lighter and more compact, facilitating portability and use.

[0107] In some embodiments, the lens satisfies the following conditional formula:

[0108] 1.0 < Fw / H < 1.5;

[0109] 12.5 < Fl / H < 14.5;

[0110] In the formula, Fw is the focal length at the wide-angle end, Fl is the focal length at the telephoto end, and H is the semi-image height of the lens.

[0111] This conditional formula provides specific focal length and image height range limitations for the lens. The appropriate focal length range helps to further correct aberrations and improve the sharpness and clarity of the image. Within a specific focal length range, the lens can better focus light and produce a clearer image. By satisfying this conditional formula, the lens can provide clear images within different focal length ranges, enabling the lens to adapt to different shooting scenarios, including the shooting requirements at the wide-angle end and the telephoto end. This meets the needs of professional photographers for high-quality imaging.

[0112] Embodiment 1

[0113] Figure 1 Shown is a schematic structural diagram of a large-format zoom cinema lens of Embodiment 1. As Figure 1As shown, in this embodiment, the fixed group is composed of a first lens group G01 with negative optical power, a third lens group G03 with positive optical power, and an eighth lens group G08 with positive optical power. The zoom group is composed of a fourth lens group G04 with positive optical power, a fifth lens group G05 with negative optical power, a sixth lens group G06 with positive optical power, and a seventh lens group G07 with positive optical power. The focusing group is a second lens group G02 with positive optical power. The first lens group G01 includes, in order from the object side to the image side, a first lens L1 with negative optical power, a second lens L2 with negative optical power, and a third lens L3 with positive optical power. Among them, the second lens L2 and the third lens L3 are cemented. The second lens group G02 includes, in order from the object side to the image side, a fourth lens L4 with positive optical power, a fifth lens L5 with negative optical power, and a sixth lens L6 with positive optical power. Among them, the fifth lens L5 and the sixth lens L6 are cemented. The third lens group G03 is a seventh lens L7 with positive optical power. The fourth lens group G04 includes, in order from the object side to the image side, an eighth lens L8 with negative optical power, a ninth lens L9 with positive optical power, and a tenth lens L10 with positive optical power. Among them, the eighth lens L8 and the ninth lens L9 are cemented. The fifth lens group G05 includes, in order from the object side to the image side, an eleventh lens L11 with negative optical power, a twelfth lens L12 with negative optical power, a thirteenth lens L13 with negative optical power, and a fourteenth lens L14 with positive optical power. The sixth lens group G06 includes, in order from the object side to the image side, a fifteenth lens L15 with negative optical power, a sixteenth lens L16 with positive optical power, a seventeenth lens L17 with positive optical power, and an eighteenth lens L18 with negative optical power. The seventh lens group G07 includes, in order from the object side to the image side, a nineteenth lens L19 with positive optical power and a twentieth lens L20 with negative optical power. The eighth lens group G08 includes, in order from the object side to the image side, a twenty-first lens L21 with positive optical power, a twenty-second lens L22 with positive optical power, a twenty-third lens L23 with negative optical power, a twenty-fourth lens L24 with positive optical power, a twenty-fifth lens L25 with negative optical power, a twenty-sixth lens L26 with positive optical power, a twenty-seventh lens L27 with positive optical power, a twenty-eighth lens L28 with negative optical power, a twenty-ninth lens L29 with negative optical power, a thirtieth lens L30 with positive optical power, a thirty-first lens L31 with negative optical power, and a thirty-second lens L32 with positive optical power. Among them, the twenty-second lens L22 and the twenty-third lens L23 are cemented, the twenty-fourth lens L24, the twenty-fifth lens L25, and the twenty-sixth lens L26 are cemented, the twenty-seventh lens L27 and the twenty-eighth lens L28 are cemented, the twenty-ninth lens L29 and the thirtieth lens L30 are cemented, and the thirty-first lens L31 and the thirty-second lens L32 are cemented. Among them, the eighth lens group G08 satisfies the following conditional formula:

[0114] 2.5 < F8 / Fw < 3.5.

[0115] In this embodiment, the numerical data of the large-format zoom cine lens are shown in Table 1 and Table 2:

[0116] Table 1

[0117]

[0118]

[0119]

[0120] Table 2

[0121]

[0122] Among them, the surface number indicates the surface numbers of the lenses from the object side to the image side.

[0123] Embodiment 2

[0124] Figure 2 Shown is a schematic structural diagram of the large-format zoom cine lens of Embodiment 2. As Figure 1As shown, in this embodiment, the fixed group is composed of the first lens group G01 with negative optical power, the third lens group G03 with positive optical power, and the eighth lens group G08 with positive optical power. The zoom group is composed of the fourth lens group G04 with positive optical power, the fifth lens group G05 with negative optical power, the sixth lens group G06 with positive optical power, and the seventh lens group G07 with positive optical power. The focusing group is the second lens group G02 with positive optical power. The first lens group G01 includes, in order from the object side to the image side, a first lens L1 with negative optical power, a second lens L2 with negative optical power, and a third lens L3 with positive optical power. Among them, the second lens L2 and the third lens L3 are cemented. The second lens group G02 includes, in order from the object side to the image side, a fourth lens L4 with positive optical power, a fifth lens L5 with negative optical power, and a sixth lens L6 with positive optical power. Among them, the fifth lens L5 and the sixth lens L6 are cemented. The third lens group G03 is the seventh lens L7 with positive optical power. The fourth lens group G04 includes, in order from the object side to the image side, an eighth lens L8 with negative optical power, a ninth lens L9 with positive optical power, and a tenth lens L10 with positive optical power. Among them, the eighth lens L8 and the ninth lens L9 are cemented. The fifth lens group G05 includes, in order from the object side to the image side, an eleventh lens L11 with negative optical power, a twelfth lens L12 with negative optical power, a thirteenth lens L13 with negative optical power, and a fourteenth lens L14 with positive optical power. The sixth lens group G06 includes, in order from the object side to the image side, a fifteenth lens L15 with negative optical power, a sixteenth lens L16 with positive optical power, a seventeenth lens L17 with positive optical power, and an eighteenth lens L18 with negative optical power. The seventh lens group G07 includes, in order from the object side to the image side, a nineteenth lens L19 with positive optical power and a twentieth lens L20 with negative optical power.The eighth lens group G08 includes, in order from the object side to the image side, a twenty-first lens L21 with a positive focal power, a twenty-second lens L22 with a positive focal power, a twenty-third lens L23 with a negative focal power, a twenty-fourth lens L24 with a positive focal power, a twenty-fifth lens L25 with a negative focal power, a twenty-sixth lens L26 with a positive focal power, a twenty-seventh lens L27 with a positive focal power, a twenty-eighth lens L28 with a negative focal power, a twenty-ninth lens L29 with a negative focal power, a thirtieth lens L30 with a positive focal power, a thirty-first lens L31 with a negative focal power, a thirty-second lens L32 with a positive focal power, a thirty-third lens L33 with a negative focal power, a thirty-fourth lens L34 with a positive focal power, a thirty-fifth lens L35 with a negative focal power, a thirty-sixth lens L36 with a positive focal power, and a thirty-seventh lens L37 with a negative focal power; wherein the twenty-second lens L22 and the twenty-third lens L23 are cemented, the twenty-fourth lens L24, the twenty-fifth lens L25, and the twenty-sixth lens L26 are cemented, the twenty-seventh lens L27 and the twenty-eighth lens L28 are cemented, the twenty-ninth lens L29 and the thirtieth lens L30 are cemented, the thirty-first lens L31 and the thirty-second lens L32 are cemented, and the thirty-sixth lens L36 and the thirty-seventh lens L37 are cemented. Among them, the eighth lens group G08 satisfies the following conditional expressions:.

[0125] 3.8 < F8 / Fw < 4.8.

[0126] In this embodiment, the numerical data of the large-format zoom movie lens are shown in Tables 3 and 4:

[0127] Table 3

[0128]

[0129]

[0130]

[0131]

[0132] Table 4

[0133]

[0134]

[0135] Example 3

[0136] Figure 3 Shown is a schematic structural diagram of the large-format zoom movie lens of Example 3. As Figure 3As shown, in this embodiment, the fixed group is composed of the first lens group G01 with negative optical power, the third lens group G03 with positive optical power, and the eighth lens group G08 with positive optical power; the variable magnification group is composed of the fourth lens group G04 with positive optical power, the fifth lens group G05 with negative optical power, the sixth lens group G06 with positive optical power, and the seventh lens group G07 with positive optical power; the focusing group is the second lens group G02 with positive optical power. The first lens group G01 includes, in order from the object side to the image side, a first lens L1 with negative optical power, a second lens L2 with negative optical power, and a third lens L3 with positive optical power, wherein the second lens L2 and the third lens L3 are cemented; the second lens group G02 includes, in order from the object side to the image side, a fourth lens L4 with positive optical power, a fifth lens L5 with negative optical power, and a sixth lens L6 with positive optical power, wherein the fifth lens L5 and the sixth lens L6 are cemented; the third lens group G03 is a seventh lens L7 with positive optical power; the fourth lens group G04 includes, in order from the object side to the image side, an eighth lens L8 with negative optical power, a ninth lens L9 with positive optical power, and a tenth lens L10 with positive optical power, wherein the eighth lens L8 and the ninth lens L9 are cemented; the fifth lens group G05 includes, in order from the object side to the image side, an eleventh lens L11 with negative optical power, a twelfth lens L12 with negative optical power, a thirteenth lens L13 with negative optical power, and a fourteenth lens L14 with positive optical power. The sixth lens group G06 includes, in order from the object side to the image side, a fifteenth lens L15 with negative optical power, a sixteenth lens L16 with positive optical power, a seventeenth lens L17 with positive optical power, and an eighteenth lens L18 with negative optical power; the seventh lens group G07 includes, in order from the object side to the image side, a nineteenth lens L19 with positive optical power and a twentieth lens L20 with negative optical power.The eighth lens group G08 includes, in order from the object side to the image side, a twenty-first lens L21 with a positive focal power, a twenty-second lens L22 with a positive focal power, a twenty-third lens L23 with a negative focal power, a twenty-fourth lens L24 with a positive focal power, a twenty-fifth lens L25 with a negative focal power, a twenty-sixth lens L26 with a positive focal power, a twenty-seventh lens L27 with a positive focal power, a twenty-eighth lens L28 with a negative focal power, a twenty-ninth lens L29 with a negative focal power, a thirtieth lens L30 with a positive focal power, a thirty-first lens L31 with a negative focal power, a thirty-second lens L32 with a positive focal power, a thirty-third lens L33 with a positive focal power, a thirty-fourth lens L34 with a negative focal power, a thirty-fifth lens L35 with a positive focal power, a thirty-sixth lens L36 with a negative focal power, a thirty-seventh lens L37 with a positive focal power, a thirty-eighth lens L38 with a negative focal power, and a thirty-ninth lens L39 with a positive focal power; wherein the twenty-second lens L22 and the twenty-third lens L23 are cemented, the twenty-fourth lens L24, the twenty-fifth lens L25, and the twenty-sixth lens L26 are cemented, the twenty-seventh lens L27 and the twenty-eighth lens L28 are cemented, the twenty-ninth lens L29 and the thirtieth lens L30 are cemented, the thirty-first lens L31 and the thirty-second lens L32 are cemented, the thirty-fifth lens L35 and the thirty-sixth lens L36 are cemented, and the thirty-seventh lens L37 and the thirty-eighth lens L38 are cemented. Among them, the eighth lens group G08 satisfies the following conditional formula:.

[0137] 2.0 < F8 / Fw < 3.5.

[0138] In this embodiment, the numerical data of the large-format zoom movie lens are shown in Tables 5 and 6 as follows:

[0139] Table 5

[0140]

[0141]

[0142]

[0143]

[0144] Table 6

[0145]

[0146] This application also provides an image pickup device, which includes a camera body and the large-format zoom movie lens as described above, and the camera body is detachably connected to the large-format zoom movie lens.

[0147] In this embodiment, the image pickup device includes all the technical solutions of all the above embodiments of the large-format zoom cinema lens, and thus has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be elaborated one by one here.

[0148] The above are only partial or preferred embodiments of the present application. Whether in terms of text or drawings, the scope of protection of the present application cannot be limited thereby. Any equivalent structural transformation made by using the content of the specification and drawings of the present application under the overall concept of the present application, or any direct / indirect application in other related technical fields is included in the scope of protection of the present application.

Claims

1. A large-format zoom cinema lens, characterized in that, From the object side to the image side, it sequentially includes a first fixed group with negative focal power, a focusing group with positive focal power, a second fixed group with positive focal power, a zooming group with negative focal power, a diaphragm, and a third fixed group with positive focal power; The zooming group can move along the optical axis based on user requirements; During the focusing process, the focusing group moves along the optical axis, and the first fixed group, the second fixed group, and the third fixed group remain unchanged with respect to the position of the image plane.

2. The large-format zoom cinematographic lens according to claim 1, wherein The first fixed group is a first lens group, and the first lens group sequentially includes a first lens with negative focal power, a second lens with negative focal power, and a third lens with positive focal power from the object side to the image side; Wherein, the second lens and the third lens are cemented.

3. The large-format zoom cine lens according to claim 1, characterized in that, The focusing group is a second lens group, and the second lens group satisfies the following conditional formula: 0.5 < F2 / L < 0.7; In the formula, F2 is the focal length of the second lens group, and L is the total length from the first lens near the object side of the lens to the image plane.

4. The large-format zoom movie lens according to claim 3, wherein, The second lens group sequentially includes a fourth lens with positive focal power, a fifth lens with negative focal power, and a sixth lens with positive focal power from the object side to the image side, and the fifth lens and the sixth lens are cemented; Or, The second lens group sequentially includes a fourth lens with positive focal power, a fifth lens with negative focal power, and a sixth lens with positive focal power from the object side to the image side; or, The second lens group sequentially includes a cemented lens with negative focal power and a sixth lens with positive focal power from the object side to the image side.

5. The large-format zoom cinematographic lens according to claim 4, characterized in that, At least one lens with Abbe number Vd > 60 is included in the second lens group.

6. The large-format zoom cine lens according to claim 1, wherein The second fixed group is a third lens group, and the third lens group includes a seventh lens with positive focal power.

7. The large-format zoom cine lens according to claim 1, wherein The zooming group includes multiple lens groups, and the zooming group satisfies the following conditional formula: 1.2 < |F4| / Fw < 3.0; In the formula, F4 is the combined focal length of the zooming group, and Fw is the focal length of the wide-angle end of the lens.

8. The large-format zoom cine lens according to claim 7, characterized in that, The zooming group sequentially includes a fourth lens group, a fifth lens group, and a sixth lens group from the object side to the image side; Wherein, at least one of the fourth lens group, the fifth lens group, and the sixth lens group has negative focal power.

9. The large-format zoom cinematographic lens according to claim 8, characterized in that, The fourth lens group includes a cemented lens with positive focal power and a singlet lens with positive focal power; or, The fourth lens group includes a singlet lens with positive focal power.

10. The large-format zoom cinema lens according to claim 9, wherein, The fourth lens group sequentially includes an eighth lens with negative focal power, a ninth lens with positive focal power, and a tenth lens with positive focal power from the object side to the image side; Wherein, the eighth lens and the ninth lens are cemented, or the ninth lens and the tenth lens are cemented.

11. The large-format zoom cinematographic lens according to claim 9, wherein, The fourth lens group sequentially includes an eighth lens with positive focal power, a ninth lens with negative focal power, and a tenth lens with positive focal power from the object side to the image side; Wherein, the eighth lens and the ninth lens are cemented.

12. The large-format zoom cinematographic lens according to claim 8, wherein The fifth lens group sequentially includes a lens unit with negative focal power, a thirteenth lens with negative focal power, and a fourteenth lens with positive focal power from the object side to the image side.

13. The large-format zoom cine lens according to claim 12, wherein, The lens unit with negative refractive power sequentially includes an eleventh lens with negative refractive power and a twelfth lens with negative refractive power from the object side to the image side; or, The lens unit with negative refractive power sequentially includes an eleventh lens with negative refractive power and a twelfth lens with negative refractive power from the object side to the image side, and the eleventh lens and the twelfth lens are cemented.

14. The large-format zoom cine lens according to claim 8, wherein, The sixth lens group includes a fifteenth lens with positive refractive power and a sixteenth lens with positive refractive power; or, The sixth lens group includes a fifteenth lens with positive refractive power and a sixteenth lens with negative refractive power; or, The sixth transmissive lens group sequentially includes a fifteenth lens with negative refractive power, a sixteenth lens with positive refractive power, a seventeenth lens with positive refractive power, and an eighteenth lens with negative refractive power from the object side to the image side, wherein the fifteenth lens and the sixteenth lens are cemented; or, The sixth transmissive lens group sequentially includes a sixteenth lens with positive refractive power, a seventeenth lens with positive refractive power, and an eighteenth lens with negative refractive power from the object side to the image side.

15. The large-format zoom cinematographic lens according to claim 8, wherein, The varifocal group further includes a seventh lens with positive refractive power, and the seventh lens is disposed on a side of the sixth lens away from the fifth lens.

16. The large-format zoom cinema lens according to claim 15, wherein The seventh lens group sequentially includes a nineteenth lens with positive refractive power and a twentieth lens with negative refractive power from the object side to the image side; or, The seventh lens group sequentially includes a nineteenth lens with positive refractive power, a twentieth lens with negative refractive power, and a singlet lens with positive refractive power from the object side to the image side; or The seventh lens group sequentially includes a nineteenth lens with positive refractive power, a twentieth lens with negative refractive power, and a singlet lens with positive refractive power from the object side to the image side; the twentieth lens and the singlet lens are cemented.

17. The large-format zoom cine lens according to claim 1, wherein, The third fixed group is an eighth lens group, and the eighth lens group satisfies the conditional formula: 2 < F8 / Fw < 4.8; 0.2 < F8 / Fl < 0.9; In the formula, F8 is the focal length of the eighth lens group, Fw is the focal length at the wide-angle end, and Fl is the focal length at the telephoto end.

18. The large-format zoom cinematographic lens according to claim 16, characterized in that, The eighth lens group sequentially includes a twenty-first lens with positive refractive power, a twenty-second lens with positive refractive power, a twenty-third lens with positive refractive power, and a twenty-fourth lens with negative refractive power from the object side to the image side; or, The eighth lens group sequentially includes a twenty-first lens with positive refractive power, a twenty-second lens with negative refractive power, a twenty-third lens with positive refractive power, and a twenty-fourth lens with negative refractive power from the object side to the image side; or, The eighth lens group sequentially includes, from the object side to the image side, a twenty-first lens with a positive focal power, a twenty-second lens with a positive focal power, a twenty-third lens with a negative focal power, a twenty-fourth lens with a positive focal power, a twenty-fifth lens with a negative focal power, a twenty-sixth lens with a positive focal power, a twenty-seventh lens with a positive focal power, a twenty-eighth lens with a negative focal power, a twenty-ninth lens with a negative focal power, a thirtieth lens with a positive focal power, a thirty-first lens with a negative focal power, and a thirty-second lens with a positive focal power; wherein, the twenty-second lens and the twenty-third lens are cemented, the twenty-fourth lens, the twenty-fifth lens, and the twenty-sixth lens are cemented, the twenty-seventh lens and the twenty-eighth lens are cemented, the twenty-ninth lens and the thirtieth lens are cemented, the thirty-first lens and the thirty-second lens are cemented; or, The eighth lens group sequentially includes, from the object side to the image side, a twenty-first lens with a positive focal power, a twenty-second lens with a positive focal power, a twenty-third lens with a negative focal power, a twenty-fourth lens with a positive focal power, a twenty-fifth lens with a negative focal power, a twenty-sixth lens with a positive focal power, a twenty-seventh lens with a positive focal power, a twenty-eighth lens with a negative focal power, a twenty-ninth lens with a negative focal power, a thirtieth lens with a positive focal power, a thirty-first lens with a negative focal power, a thirty-second lens with a positive focal power, a thirty-third lens with a negative focal power, a thirty-fourth lens with a positive focal power, a thirty-fifth lens with a negative focal power, a thirty-sixth lens with a positive focal power, and a thirty-seventh lens with a negative focal power; wherein, the twenty-second lens and the twenty-third lens are cemented, the twenty-fourth lens, the twenty-fifth lens, and the twenty-sixth lens are cemented, the twenty-seventh lens and the twenty-eighth lens are cemented, the twenty-ninth lens and the thirtieth lens are cemented, the thirty-first lens and the thirty-second lens are cemented, the thirty-sixth lens and the thirty-seventh lens are cemented; or, The eighth lens group sequentially includes, from the object side to the image side, a twenty-first lens with positive optical power, a twenty-second lens with positive optical power, a twenty-third lens with negative optical power, a twenty-fourth lens with positive optical power, a twenty-fifth lens with negative optical power, a twenty-sixth lens with positive optical power, a twenty-seventh lens with positive optical power, a twenty-eighth lens with negative optical power, a twenty-ninth lens with negative optical power, a thirtieth lens with positive optical power, a thirty-first lens with negative optical power, a thirty-second lens with positive optical power, a thirty-third lens with positive optical power, a thirty-fourth lens with negative optical power, a thirty-fifth lens with positive optical power, a thirty-sixth lens with negative optical power, a thirty-seventh lens with positive optical power, a thirty-eighth lens with negative optical power, and a thirty-ninth lens with positive optical power; wherein, the twenty-second lens and the twenty-third lens are cemented, the twenty-fourth lens, the twenty-fifth lens, and the twenty-sixth lens are cemented, the twenty-seventh lens and the twenty-eighth lens are cemented, the twenty-ninth lens and the thirtieth lens are cemented, the thirty-first lens and the thirty-second lens are cemented, the thirty-fifth lens and the thirty-sixth lens are cemented, and the thirty-seventh lens and the thirty-eighth lens are cemented.

19. The large-format zoom cinema lens according to claim 18, wherein The eighth lens group includes at least one lens with an Abbe number Vd > 60 and at least one lens with a refractive index nd > 1.

8.

20. The large-format zoom cine lens according to any one of claims 1-19, characterized in that, The lens satisfies the following conditional expressions: 1.0 < Fw / H < 1.5; 12.5 < Fl / H < 14.5; In the formulas, Fw is the focal length at the wide-angle end, Fl is the focal length at the telephoto end, and H is the semi-image height of the lens.

21. An image pickup device, characterized in that, It includes a camera body and a large-format zoom cine lens as described in any one of claims 1-19, and the camera body is detachably connected to the large-format zoom cine lens.

Images