Microspur wide-angle photographic lens
By designing a combination of the front and rear lens groups for macro wide-angle photography lenses, the problems of small angle and low magnification of existing photography lenses are solved, achieving a large depth of field and high magnification while reducing costs.
Patent Information
- Application Number
- CN202423173901.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-23
- Publication Date
- 2026-02-13
- Estimated Expiration
- 2034-12-23
AI Technical Summary
Existing camera lenses have limited shooting angles, low adjustable magnification, and are expensive, failing to meet diverse needs.
Design a macro wide-angle photography lens that uses a combination of a front lens group and a rear lens group. The front lens group has negative optical power, and the rear lens group has positive optical power. The distance between the lens groups is less than 80mm, and the shooting angle can be adjusted to 100-180 degrees. Combined with the focal length range of a specific lens, it achieves a large depth of field and high magnification.
It enables efficient adjustment of wide-angle lenses on both full-frame and APS-C sensors, increasing the shooting angle and improving the lens's usability and image sharpness.
Smart Images
Figure CN223911119U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to photography lens technical field especially relates to a macro wide-angle photography lens. BACKGROUND
[0002] Photography lens is the optical component for generating image in photography equipment, it is the basic unit of the film and television works, and the function of photography lens is mainly to collect the reflection of the object and focus it on the photosensitive element such as CCD or CMOS. Its imaging principle is similar to the human eye, and the image projected on the photosensitive element is inverted, but the camera circuit has the function of reversing it. The quality of the lens directly affects the overall performance of the camera, and a good lens can provide clearer and more realistic images.
[0003] In recent years, with the diversification of photography lens, various photography lenses are constantly updated, but the existing photography lens still has some problems, for example, the current photography lens has a small photography angle, the adjustable magnification is low, and the price is always high, which cannot meet different needs, so a macro wide-angle photography lens is needed to solve the above problems. UTILITY MODEL CONTENT
[0004] The purpose of the embodiment of the utility model is to provide a macro wide-angle photography lens, which aims to solve the problems mentioned in the background art.
[0005] The embodiment of the utility model is implemented as follows: a macro wide-angle photography lens comprises a front lens group and a rear lens group, the front lens group has a negative focal length, the rear main lens group has a positive focal length, the axial distance L of the macro wide-angle photography lens from the first lens surface to the last lens surface of the object side is less than 80mm, and the angle of the front lens group can be increased to 100-180 degrees during photography.
[0006] Preferably, the effective focal length EFL of the macro wide-angle photography lens satisfies 20mm
[0007] Preferably, the front lens group comprises a first negative lens, a second negative lens, a first positive lens, a second positive lens and a third negative lens, the first negative lens, the second negative lens, the first positive lens, the second positive lens and the third negative lens are sequentially distributed from left to right, wherein the second negative lens and the first positive lens are a cemented lens group, and the second positive lens and the third negative lens are a cemented lens group.
[0008] Preferably, the first negative lens satisfies focal length -45mm < f1 < -35mm, the first negative lens satisfies focal length -15mm < f2 < -10mm, the first positive lens satisfies focal length 15mm < f3 < 17mm, the second positive lens satisfies focal length 15mm < f4 < 17mm, and the third negative lens satisfies focal length -15mm < f5 < -10mm.
[0009] Preferably, the rear lens group comprises a third positive lens, a fourth positive lens, a fourth negative lens and a fifth positive lens, which are sequentially arranged from left to right.
[0010] Preferably, the third positive lens satisfies focal length 16mm < f6 < 20mm, the fourth positive lens satisfies focal length 35mm < f7 < 45mm, the fourth negative lens satisfies focal length -11mm < f8 < -7mm, and the fifth positive lens satisfies focal length 18mm < f9 < 22mm.
[0011] The macro wide-angle photographic lens provided by the utility model can be used on full-frame inches and APS-C frame through the combination of the front lens group and the rear lens group, the wide-angle front lens in front of the photographic lens can increase the angle to 100-180 degrees during photography, the distance between the front lens group and the rear lens group can be adjusted to achieve corresponding magnification, and the utility model has high practicability. BRIEF DESCRIPTION OF DRAWINGS
[0012] Figure 1 It is a schematic view of the macro wide-angle photographic lens.
[0013] In the drawings: SP1-front lens group, SP2-rear lens group, S1-first negative lens, S2-second negative lens, S3-first positive lens, S4-second positive lens, S5-third negative lens, S6-third positive lens, S7-fourth positive lens, S8-fourth negative lens, and S9-fifth positive lens. DETAILED DESCRIPTION
[0014] In order to make the purpose, technical scheme and advantages of the utility model more clear, the utility model is further described in detail below in combination with the drawings and examples.
[0015] The specific implementation of the utility model is described in detail below in combination with specific examples.
[0016] Please refer to Figure 1 The utility model embodiment provides a macro wide-angle photographic lens, which comprises:
[0017] The front mirror lens group SP1 has negative focal power, and the rear mirror lens group SP2 has positive focal power, the axial distance L from the first lens surface to the last lens surface of the macro wide-angle photographic lens is less than 80mm, and the front mirror lens group SP1 can increase the angle to 100-180 degrees during photography.
[0018] The front mirror lens group SP1 can increase the angle to 100-180 degrees during photography, so that the macro wide-angle photographic lens can realize a large depth of field and can realize background information exchange at a large magnification.
[0019] As shown in Figure 1 As a preferred embodiment of the utility model, the effective focal length EFL of the macro wide-angle photographic lens satisfies 20mm < f < 25mm.
[0020] As shown in Figure 1 As a preferred embodiment of the utility model, the front mirror lens group SP1 comprises a first negative lens S1, a second negative lens S2, a first positive lens S3, a second positive lens S4 and a third negative lens S5, and the first negative lens S1, the second negative lens S2, the first positive lens S3, the second positive lens S4 and the third negative lens S5 are sequentially arranged from left to right, wherein the second negative lens S2 and the first positive lens S3 are cemented lens groups, and the second positive lens S4 and the third negative lens S5 are cemented lens groups.
[0021] As shown in Figure 1 As a preferred embodiment of the utility model, the first negative lens S1 satisfies focal length -45mm < f1 < -35mm, the second negative lens S2 satisfies focal length -15mm < f2 < -10mm, the first positive lens S3 satisfies focal length 15mm < f3 < 17mm, the second positive lens S4 satisfies focal length 15mm < f4 < 17mm, and the third negative lens S5 satisfies focal length -15mm < f5 < -10mm.
[0022] As shown in Figure 1 As a preferred embodiment of the utility model, the rear lens group SP2 comprises a third positive lens S6, a fourth positive lens S7, a fourth negative lens S8 and a fifth positive lens S9, and the third positive lens S6, the fourth positive lens S7, the fourth negative lens S8 and the fifth positive lens S9 are sequentially arranged from left to right.
[0023] As shown in Figure 1 As a preferred embodiment of the utility model, the third positive lens S6 satisfies focal length 16mm < f6 < 20mm, the fourth positive lens S7 satisfies focal length 35mm < f7 < 45mm, the fourth negative lens S8 satisfies focal length -11mm < f8 < -7mm, and the fifth positive lens S9 satisfies focal length 18mm < f9 < 22mm.
[0024] Working principle: please refer to Figure 1 , indicates that the front lens group SP1 and the rear lens group SP2 in the utility model are combined, and the numerical examples are shown in Table 1, in the embodiment, n, v are based on d line.
[0025] Table 1: structure numerical example table of SP1 lens group
[0026] Surf STYP Radius Thickness Nd Vd SEMIDIAMETER GLASS OBJ STANDARD Infinity 40 125.6116 1 STANDARD Infinity 0 30.9629 2 STANDARD 161.4776 0.9981 1.516802 64.230624 29.3787 H-K9L 3 STANDARD 18.908 6.8533 26.4 4 STANDARD -43.4881 1.9952 1.781796 37.094648 22.1447 H-LAF7 5 STANDARD 13.0888 6.1834 1.740005 28.291496 19.7641 H-ZF5 6 STANDARD -264.9261 5 19.3863 7 STANDARD 264.9261 6.1834 1.740005 28.291496 16.6887 H-ZF5 8 STANDARD -13.0888 1.9952 1.781796 37.094648 15.6083 H-LAF7 9 STANDARD 43.4881 14.1078 14.2259 10 STANDARD 12.064 2.9753 1.64 60.200016 10.9987 H-LAK4L 11 STANDARD Infinity 0.1 10.1395 12 STANDARD 15.8539 3.7661 1.910826 35.255728 9.3977 H-ZLAF4LA 13 STANDARD 23.9009 0.7638 6.8611 14 STANDARD -28.4994 0.7999 1.761823 26.613203 6.4264 H-ZF12 15 STANDARD 9.2878 2 5.6792 STO STANDARD Infinity 2 5 17 STANDARD 51.8941 5.2777 1.772501 49.613485 7.0953 H-LAF50B 18 STANDARD -21.7808 3 9.1596 19 STANDARD Infinity 0.7 1.5168 64.167336 10.7339 BK7 20 STANDARD Infinity 69.0285 10.9385 IMA STANDARD Infinity 42.1797
[0027] The above only is the preferred embodiment of the utility model, and does not limit the utility model, and any modification, equivalent replacement and improvement, etc. within the spirit and principle of the utility model should be included in the protection scope of the utility model.
Claims
1. A macro wide-angle photographic lens comprising a front lens group and a rear lens group, characterized in that, The front lens group has negative focal power, the rear main lens group has positive focal power, the macro wide-angle camera lens has an axial distance L < 80 mm from a first lens surface to a last lens surface on the object side, and the front lens group can increase to 100-180 degrees in the angle of photography. The front lens group comprises a first negative lens, a second negative lens, a first positive lens, a second positive lens and a third negative lens, and the first negative lens, the second negative lens, the first positive lens, the second positive lens and the third negative lens are sequentially arranged from left to right, wherein the second negative lens and the first positive lens are a cemented lens group, and the second positive lens and the third negative lens are a cemented lens group.
2. The macro wide photography lens according to claim 1, wherein, The effective focal length EFL of the macro wide-angle camera lens satisfies 20 mm < f < 25 mm.
3. The macro wide photography lens of claim 1, wherein, The first negative lens satisfies a focal length of -45 mm < f1 < -35 mm, the second negative lens satisfies a focal length of -15 mm < f2 < -10 mm, the first positive lens satisfies a focal length of 15 mm < f3 < 17 mm, the second positive lens satisfies a focal length of 15 mm < f4 < 17 mm, and the third negative lens satisfies a focal length of -15 mm < f5 < -10 mm.
4. The macro wide photography lens of claim 1, wherein, The rear lens group comprises a third positive lens, a fourth positive lens, a fourth negative lens and a fifth positive lens, and the third positive lens, the fourth positive lens, the fourth negative lens and the fifth positive lens are sequentially arranged from left to right.
5. The macro wide photography lens according to claim 4, wherein, The third positive lens satisfies a focal length of 16 mm < f6 < 20 mm, the fourth positive lens satisfies a focal length of 35 mm < f7 < 45 mm, the fourth negative lens satisfies a focal length of -11 mm < f8 < -7 mm, and the fifth positive lens satisfies a focal length of 18 mm < f9 < 22 mm.