35mm breathing-eliminating full-frame camera lens

Abstract

The utility model discloses a 35mm breathing-eliminating full-frame camera lens, and aims to solve the problems that in the prior art, when a visual angle is slightly enlarged or reduced due to focus change, a picture shakes unnecessarily, the fluency and the ornamental value of a video are influenced, and the visual angle of the camera is not changed. The utility model solves the technical problem that an existing lens lacks stability and consistency during video recording, and comprises an iris diaphragm, and a first lens group, a second lens group and a third lens group which are sequentially arranged from an object side to an image side, the first lens group is composed of seven lenses and serves as a fixed group of the camera lens, and the focal power is positive; the iris diaphragm is located between the first lens group and the second lens group; the second lens group is composed of three lenses and serves as a focusing group of the camera lens, and the focal power is positive; the third lens group is composed of two lenses and serves as a fixed group of the camera lens, and the focal power is negative.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of camera lens, specifically relates to a 35mm breathes full frame camera lens. BACKGROUND

[0002] With the rapid development of social media platforms and the popularity of short video content, more and more users tend to record and share their daily life through shooting Vlog (video blog) and share it with others. This trend has led to an increase in demand for high-performance, portable photography equipment, especially for those who want to easily carry and operate a mirrorless camera without compromising image quality. Video bloggers not only pursue high-quality static images, but also pay special attention to the expressiveness and stability of video content to ensure that the audience can have the best viewing experience.

[0003] In the prior art, the mirrorless lens product line mainly focuses on optimizing the quality of static images, such as providing a large aperture to achieve a shallow depth of field effect, reducing distortion to ensure image edge sharpness, and improving resolution to ensure detail reproduction. These lenses meet the needs of photographers for photo shooting, thus providing excellent performance in image quality.

[0004] The prior art has the following technical problems:

[0005] 1. The existing lens does not fully consider the characteristics and requirements of dynamic images during video shooting. For example, the "breathing effect" that occurs when adjusting the focus - the phenomenon of slight magnification or reduction of the viewing angle due to focus changes - can cause unnecessary shaking of the picture, affecting the smoothness and watchability of the video.

[0006] 2. The existing lens lacks stability and consistency during video recording, resulting in a final output video quality that does not meet the standards of professional-level video. INVENTION CONTENT

[0007] To solve the above technical problems in the prior art, such as not fully considering the characteristics and requirements of dynamic images during video shooting, when the phenomenon of slight magnification or reduction of the viewing angle due to focus changes occurs, causing unnecessary shaking of the picture, affecting the smoothness and watchability of the video, and the existing lens lacking stability and consistency during video recording, the utility model provides a 35mm breathes full frame camera lens.

[0008] The technical solution adopted by the utility model is as follows:

[0009] A 35mm breathes full frame camera lens, comprising: a variable diaphragm, and a first lens group, a second lens group and a third lens group arranged in order from the object side to the image side;

[0010] The first lens group is composed of seven lenses, as a fixed group of the camera lens, with positive refractive power; the first lens group comprises, in order from the object side to the image side, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens;

[0011] The variable diaphragm is located between the first lens group and the second lens group;

[0012] The second lens group is composed of three lenses, as a focusing group of the camera lens, with positive refractive power; the second lens group comprises, in order from the object side to the image side, an eighth lens, a ninth lens and a tenth lens;

[0013] The third lens group is composed of two lenses, as a fixed group of the camera lens, with negative refractive power; the third lens group comprises, in order from the object side to the image side, an eleventh lens and a twelfth lens.

[0014] With the above technical scheme, the utility model has the advantages that: the utility model adopts 35mm focal length design, provides standard visual angle, is suitable for various shooting scenes. The lens is divided into three lens groups (fixed group, focusing group, fixed group), which simplifies the overall structure, improves the tolerance accommodation degree, and ensures the imaging quality under different shooting distances. The variable diaphragm is arranged between the first lens group and the second lens group, which helps to balance the light distribution, reduce aberration and improve image quality.

[0015] Further, the first lens is a negative lens, the second lens is a positive lens, the third lens is a negative lens, the fourth lens is a positive lens, the fifth lens is a positive lens, the sixth lens is a negative lens, and the seventh lens is a positive lens; the eighth lens is a negative lens, the ninth lens is a positive lens, and the tenth lens is a positive lens; the eleventh lens is a negative lens; and the twelfth lens is a positive lens.

[0016] With the above technical scheme, the utility model has the advantages that: the utility model can effectively correct chromatic aberration and other optical aberrations by arranging positive and negative lenses in a specific order, thereby improving image clarity.

[0017] Further, the first lens is a double-concave negative lens, and the first curvature radius of the first lens and the second curvature radius of the first lens satisfy the relationship: -1.5 < (L1 R2+L1 R1) / (L1 R2-L1 R1) < 0.5.

[0018] Wherein, L1 R1 represents the first curvature radius, and L1 R2 represents the second curvature radius.

[0019] Wherein, the first curvature radius is the curvature radius of the object side of the first lens, and the second curvature radius is the curvature radius of the image side of the first lens.

[0020] With the above technical scheme, the first lens of the utility model adopts a double-concave negative lens, and in combination with the relationship formula of the curvature radius, the spherical aberration can be reduced while ensuring sufficient negative focal power, and the sharpness of the central region is improved.

[0021] Further, the second lens is a meniscus positive lens bent towards the object side, and the focal length FG1 of the second lens and the total effective focal length f of the camera lens satisfy the relationship formula: 2.30<FG1 / f<4.25.

[0022] With the above technical scheme, the second lens of the utility model is a meniscus positive lens bent towards the object side, and in combination with the focal length relationship formula, the coma and field curvature can be reduced while maintaining appropriate positive focal power.

[0023] Further, the first lens group includes a first doublet lens and a second doublet lens arranged from the object side to the image side, the fourth curvature radius B1 R2 of the first doublet lens and the fifth curvature radius B2R1 of the second doublet lens satisfy the relationship formula: -6.74<B1 R2 / B2R1<-4.43, and the third curvature radius B1 R1 of the first doublet lens and the sixth curvature radius B2R2 of the second doublet lens satisfy the relationship formula: 5.53<B2R2 / B1 R1<8.19.

[0024] Wherein, the third curvature radius and the fourth curvature radius are the curvature radii of the object side and the image side of the first doublet lens respectively; and the fifth curvature radius and the sixth curvature radius are the curvature radii of the object side and the image side of the second doublet lens respectively.

[0025] With the above technical scheme, the first lens group of the utility model contains two doublet lenses, and through the design of the specific curvature radius ratio, the chromatic aberration and astigmatism can be effectively corrected, and the overall quality of the image is improved. The performance of the lens under different wavelengths is more consistent, and the influence of chromatic aberration is reduced.

[0026] Further, the second lens group includes a double-convex positive lens with a double-convex shape, and the dispersion coefficient of the double-convex positive lens is greater than 68.

[0027] With the above technical scheme, the second lens group of the utility model includes a double-convex positive lens, and the dispersion coefficient of the double-convex positive lens is greater than 68, which helps to significantly reduce chromatic aberration and improve color reproduction.

[0028] Further, the focal length FG2 of the bi-convex positive lens satisfies the relationship 0.68 < FG2 / f < 1.61 with the total effective focal length f of the camera lens.

[0029] With the above technical solution, the beneficial effects of the utility model are that: the ratio of the focal length of the bi-convex positive lens to the total effective focal length ensures the flexibility and accuracy of the focusing group when adjusting the focal point, and supports smooth transition from close-up to telephoto.

[0030] Further, the tenth lens is a meniscus positive lens bent towards the object side, and the focal length FG3 of the tenth lens satisfies the relationship 1.73 < FG3 / f < 3.53 with the total effective focal length f of the camera lens.

[0031] With the above technical solution, the beneficial effects of the utility model are that: the tenth lens is a meniscus positive lens bent towards the object side, and in combination with the focal length relationship, it can reduce coma and field curvature while maintaining appropriate positive power.

[0032] Further, the total effective focal length f of the camera lens satisfies the relationship 0.89 < FG4 / f < 1.81 with the focal length FG4 of the second lens group.

[0033] With the above technical solution, the beneficial effects of the utility model are that: the ratio of the focal length of the second lens group to the total effective focal length ensures the flexibility and accuracy of the focusing group when adjusting the focal point, and supports smooth transition from close-up to telephoto.

[0034] Further, the focal length FG5 of the first lens group satisfies the relationship 0.73 < FG1 / FG3 < 1.71 with the focal length FG6 of the third lens group.

[0035] With the above technical solution, the beneficial effects of the utility model are that: the ratio of the focal length of the first lens group to the focal length of the third lens group ensures the imaging quality of the entire system, especially at the wide-angle end. The strong negative power of the third lens group helps to correct any residual aberrations caused by the first two groups, ensuring the imaging quality of the entire system.

[0036] In summary, due to the adoption of the above technical solution, the beneficial effects of the utility model are:

[0037] 1. The lens design is short and light, which is not only convenient to carry, but also reduces the burden of photographers during long-time shooting, and improves comfort.

[0038] 2. The utility model discloses provide excellent low light performance, can capture clear and bright picture under the environment of insufficient light. Meanwhile, large aperture helps to create shallow depth of field effect, highlight the main body, enhance visual appeal. And distortion is less than 3%, ensure the linearity and authenticity of image edge, especially suitable for high-precision occasions such as building photography and landscape photography.

[0039] 3. The utility model discloses divide system into three independent mirror groups, and this design not only simplifies the overall structure, but also improves the tolerance accommodation degree, ensures the stability and consistency of lens in the production process.

[0040] 4. The utility model discloses use low wave high transmission glass material, can effectively reduce chromatic aberration, improve color restoration degree, ensure that the image color of shooting is more real and natural, especially suitable for the professional application of need high color accuracy.

[0041] 5. The utility model discloses optimize especially for video recording, especially solve the " breathing effect " problem when adjusting focus, that is, the slight zoom-in or zoom-out phenomenon of view angle caused by focus change. This greatly reduces the picture jitter, improves the fluency and watchability of video.

[0042] 6. The utility model discloses use aspheric glass lens in moving group, not only significantly reduce the size and weight of moving group, but also further optimize the optical performance, reduce aberration. The application of aspheric lens makes the load of focusing motor smaller, improves the focusing speed and accuracy, ensures the efficient auto -focus performance, especially important in the fast -changing shooting environment.

[0043] 7. The utility model discloses the lens is designed especially for the demand of professional video creator, ensures the stability and consistency during video recording, meets the high -standard professional requirement, and the ability of static image and dynamic video shooting demand. DRAWINGS

[0044] In order to more clearly illustrate the technical scheme of the embodiment of the utility model, the following will be to the drawing needed in the embodiment used briefly introduces, should understand, the following drawing only shows some embodiments of the utility model, therefore should not be regarded as the limited scope, for the ordinary skill in the art person, under the premise of not paying the creative labor, can also obtain other related drawings according to these drawings, wherein:

[0045] Figure 1 It is the structure schematic diagram of 35mm breathless full frame camera lens provided by the utility model embodiment;

[0046] Figure 2 It is the spherical aberration curve diagram provided by the utility model embodiment;

[0047] Figure 3 This is a field curvature curve diagram provided according to an embodiment of the present utility model;

[0048] Figure 4 This is a distortion curve diagram provided according to an embodiment of the present utility model.

[0049] Reference numerals: G1 - First lens group, G2 - Second lens group, G3 - Third lens group, STP - Variable aperture, 1 - First lens, 2 - Second lens, 3 - Third lens, 4 - Fourth lens, 5 - Fifth lens, 6 - Sixth lens, 7 - Seventh lens, 8 - Eighth lens, 9 - Ninth lens, 10 - Tenth lens, 11 - Eleventh lens, 12 - Twelfth lens. Detailed Implementation

[0050] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the present utility model and are not intended to limit the present utility model; that is, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The components of the embodiments of the present utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0051] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0052] It should be noted that relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0053] The features and performance of this utility model will be further described in detail below with reference to the embodiments.

[0054] likeFigure 1 As shown, the present invention provides a 35mm full-frame camera lens with breath-free imaging, comprising: a variable aperture STP, and a first lens group G1, a second lens group G2 and a third lens group G3 arranged sequentially from the object side to the image side;

[0055] The first lens group G1 consists of seven lenses and serves as a fixed group of the camera lens, with positive optical power; the first lens group G1 includes a first lens 1, a second lens 2, a third lens 3, a fourth lens 4, a fifth lens 5, a sixth lens 6 and a seventh lens 7 arranged sequentially from the object side to the image side.

[0056] The variable aperture STP is located between the first lens group G1 and the second lens group G2;

[0057] The second lens group G2 consists of three lenses and serves as the focusing group of the camera lens, with positive optical power; the second lens group G2 includes an eighth lens 8, a ninth lens 9, and a tenth lens 10 arranged sequentially from the object side to the image side.

[0058] The third lens group G3 consists of two lenses and serves as a fixed group of the camera lens, with a negative optical power; the third lens group G3 includes an eleventh lens 11 and a twelfth lens 12 arranged sequentially from the object side to the image side.

[0059] In summary, this invention employs a 35mm focal length design, providing a standard field of view suitable for various shooting scenarios. Dividing the lens into three lens groups (fixed group, focusing group, and fixed group) simplifies the overall structure, improves tolerance tolerance, and ensures image quality at different shooting distances. Placing the variable aperture STP between the first lens group G1 and the second lens group G2 helps balance light distribution, reduce aberrations, and improve image quality.

[0060] Optionally, the first lens 1 is a negative lens, the second lens 2 is a positive lens, the third lens 3 is a negative lens, the fourth lens 4 is a positive lens, the fifth lens 5 is a positive lens, the sixth lens 6 is a negative lens, the seventh lens 7 is a positive lens; the eighth lens 8 is a negative lens, the ninth lens 9 is a positive lens, the tenth lens 10 is a positive lens; the eleventh lens 11 is a negative lens; and the twelfth lens 12 is a positive lens.

[0061] In summary, this invention, by arranging positive and negative lenses in a specific order, can effectively correct chromatic aberration and other optical aberrations, thereby improving image clarity.

[0062] Optionally, the first lens 1 is a negative lens with a biconcave shape, and the first curvature radius and the second curvature radius of the first lens 1 satisfy the relational expression: -1.5 < (L1 R2 + L1 R1) / (L1 R2 - L1 R1) < 0.5;

[0063] Where, L1 R1 represents the first curvature radius, and L1 R2 represents the second curvature radius;

[0064] Where, the first curvature radius is the curvature radius of the object side of the first lens 1, and the second curvature radius is the curvature radius of the image side of the first lens 1.

[0065] In summary, the first lens 1 of the present utility model adopts a negative lens with a biconcave shape. Combining the relational expression of its curvature radius, it can reduce spherical aberration and improve the sharpness of the central region while ensuring sufficient negative optical power.

[0066] Optionally, the second lens 2 is a meniscus positive lens bent towards the object side, and the focal length FG1 of the second lens 2 and the total effective focal length f of the camera lens satisfy the relational expression: 2.30 < FG1 / f < 4.25.

[0067] In summary, the second lens 2 of the present utility model is a meniscus positive lens bent towards the object side. Combining its focal length relational expression, it can reduce coma and field curvature while maintaining appropriate positive optical power.

[0068] Optionally, the first lens group G1 includes a first doublet lens and a second doublet lens arranged from the object side to the image side. The fourth curvature radius B1 R2 of the first doublet lens and the fifth curvature radius B2R1 of the second doublet lens satisfy the relational expression: -6.74 < B1 R2 / B2R1 < -4.43. The third curvature radius B1 R1 of the first doublet lens and the sixth curvature radius B2R2 of the second doublet lens satisfy the relational expression: 5.53 < B2R2 / B1 R1 < 8.19;

[0069] Where, the third curvature radius and the fourth curvature radius are respectively the curvature radii of the object side and the image side of the first doublet lens; the fifth curvature radius and the sixth curvature radius are respectively the curvature radii of the object side and the image side of the second doublet lens.

[0070] In summary, the first lens group G1 of the present utility model includes two doublet lenses. Through the design of a specific curvature radius ratio, it can effectively correct chromatic aberration and astigmatism, and improve the overall quality of the image. It makes the performance of the lens more consistent at different wavelengths and reduces the influence of chromatic aberration.

[0071] Optionally, the second lens group G2 includes a biconvex positive lens with a biconvex shape, the dispersion coefficient of the biconvex positive lens being greater than 68, and the focal length FG2 of the biconvex positive lens satisfying the relationship 0.68 with the total effective focal length f of the camera lens. <FG2 / f<1.61。

[0072] In this embodiment, the biconvex positive lens is the ninth lens 9.

[0073] In summary, the second lens group G2 of this invention includes a biconvex positive lens with a dispersion coefficient greater than 68, which helps to significantly reduce chromatic aberration and improve color reproduction. The ratio of the focal length of the biconvex positive lens to the total effective focal length ensures the flexibility and accuracy of the focusing group when adjusting the focus, supporting a smooth transition from close-up to telephoto.

[0074] Optionally, the tenth lens 10 is a meniscus lens curved towards the object side, and the focal length FG3 of the tenth lens 10 satisfies the relationship between the total effective focal length f of the camera lens and the equation: 1.73. <FG3 / f<3.53。

[0075] In summary, the tenth lens 10 of this utility model is a meniscus positive lens that bends toward the object side. Combined with its focal length relationship, it can reduce coma and field curvature while maintaining appropriate positive optical power.

[0076] Optionally, the total effective focal length f of the camera lens and the focal length FG4 of the second lens group G2 satisfy the following relationship: 0.89 <FG4 / f<1.81。

[0077] In summary, the ratio of the focal length to the total effective focal length of the second lens group G2 of this invention ensures the flexibility and accuracy of the focusing group when adjusting the focus, supporting a smooth transition from close-up to telephoto.

[0078] Optionally, the focal length FG5 of the first lens group G1 and the focal length FG6 of the third lens group G3 satisfy the relationship: 0.73 <FG1 / FG3<1.71。

[0079] In summary, the ratio of the focal length of the first lens group G1 to the focal length of the third lens group G3 ensures the imaging quality of the entire system, especially at the wide-angle end. The strong negative optical power of the third lens group G3 helps correct any residual aberrations caused by the first two groups, ensuring the imaging quality of the entire system.

[0080] In the specific implementation process, the radius of curvature, thickness, refractive index, and dispersion coefficient of each lens surface from the object side (the side of the photographed object) to the image side (the side of the image sensor or film) are shown in Table 1:

[0081]

[0082]

[0083] Table 1

[0084] Radius of curvature (mm): Indicates the degree of curvature of the lens surface. Positive values ​​represent convex surfaces, and negative values ​​represent concave surfaces.

[0085] Thickness (mm): refers to the distance between two adjacent surfaces, i.e., the thickness of the lens or air gap.

[0086] Refractive index: the ability of a material to bend light, used to calculate the change in direction of light as it passes through a lens.

[0087] Dispersion coefficient (Abbe number): A numerical value that describes the dispersion characteristics of a material. The larger the value, the smaller the color difference.

[0088] The aspherical coefficients of aspherical positive lenses are shown in Table 2:

[0089] Surface number 22 23 k 8.117 31.345 A4 -1.724e-05 -9.236e-06 A6 -1.569e-07 -1.261e-07 A8 8.395e-10 6.953e-10 A10 -4.535e-12 -2.609e-12 A12 6.331e-15 3.753e-15

[0090] Table 2

[0091] k: Conic constant, used to adjust the shape of aspherical surfaces.

[0092] A4, A6, A8, A10, A12: Higher-order aspherical coefficients, which affect the precise shape of the lens surface to optimize optical performance.

[0093] The specific values ​​of D1 and D2 in Table 1 at different focusing distances are shown in Table 3:

[0094] Conjugate distance Infinity Closest (0.35 m) D1 13.35 mm 10.42 mm D2 2.22 mm 5.15 mm

[0095] Table 3

[0096] Infinity: The dimensions of each distance when the lens is focused at infinity.

[0097] Closest (0.35m): The dimensions of each distance when the lens is focused at the closest working distance (e.g., 0.35 meters).

[0098] In summary, the key specifications of a 35mm full-frame camera lens with breathability reduction in this embodiment are shown in Table 4:

[0099] Focal length f 34.98 mm Relative aperture FNO. 1.85 Field of view angle ω 64.8° Optical total length 106 mm

[0100] Table 4

[0101] Figure 2The spherical aberration curve provided for this embodiment of the utility model shows that, as can be seen from the figure, the horizontal axis represents spherical aberration (unit: millimeters, mm). The vertical axis represents light of different wavelengths. The dashed line (dotted line) represents light with a wavelength of 486nm (blue light). The solid line represents light with a wavelength of 588nm (yellow light). The dotted line represents light with a wavelength of 656nm (red light).

[0102] As can be seen from the figure, the fluctuation range of spherical aberration for the three different wavelengths of light is relatively small, and there is a clear convergence trend near 0mm. This indicates that the lens controls spherical aberration very well at different wavelengths, reducing blur and distortion in the image.

[0103] The fact that light of different wavelengths (blue, yellow, and red) exhibits very similar spherical aberration characteristics indicates that the lens performs well in chromatic aberration correction. This means that light of different colors can be focused onto the same plane, improving the overall image sharpness and color reproduction.

[0104] Thanks to proper control of spherical aberration, the lens can maintain high resolution and sharpness across different wavelengths. This is crucial for capturing high-quality photos and videos, especially in scenarios requiring high detail and clarity.

[0105] Figure 3 The field curvature curve provided for this embodiment of the utility model is shown in the diagram, where the horizontal axis represents the field curvature (unit: millimeters, mm), and the vertical axis represents the position of different viewing angles. Solid lines represent the S (sagittal, tangential) direction, and dashed lines represent the T (tangential, radial) direction.

[0106] As can be seen from the image, the focal points of the radial and tangential rays of the internally incident light remain essentially on the same plane throughout the entire image field. This indicates that the lens has excellent control over field curvature in different directions, reducing blur and distortion in the image.

[0107] Thanks to proper field curvature control, the lens maintains high resolution and sharpness across the entire frame. This is crucial for capturing high-quality photos and videos, especially in scenes requiring high detail and clarity.

[0108] Figure 4 The distortion curve provided for the embodiments of this utility model, wherein the horizontal axis represents distortion (in percentage, %), and the vertical axis represents the position of different field of view angles.

[0109] As can be seen from the figure, the distortion at the maximum field of view is less than 3%. This indicates that the lens controls distortion very well at different field of view angles, reducing deformation and distortion in the image.

[0110] The above description is only a preferred embodiment of the present utility model and is not intended to limit the scope of protection of the present utility model. Any modifications, equivalent substitutions and improvements made by those skilled in the art within the spirit and principles of the present utility model should be included within the scope of protection of the present utility model.

Claims

1. A 35mm full-frame camera lens with breath-free focusing, characterized in that, Comprising: A variable aperture, and a first lens group, a second lens group, and a third lens group sequentially arranged from the object side to the image side; The first lens group consists of seven lenses and serves as the fixed group of the camera lens, with a positive optical power; the first lens group includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens sequentially arranged from the object side to the image side; The variable aperture is located between the first lens group and the second lens group; The second lens group consists of three lenses and serves as the focusing group of the camera lens, with a positive optical power; the second lens group includes an eighth lens, a ninth lens, and a tenth lens sequentially arranged from the object side to the image side; The third lens group consists of two lenses and serves as the fixed group of the camera lens, with a negative optical power; the third lens group includes an eleventh lens and a twelfth lens sequentially arranged from the object side to the image side.

2. The 35mm full-frame camera lens with breath-free imaging as described in claim 1, characterized in that, The first lens is a negative lens, the second lens is a positive lens, the third lens is a negative lens, the fourth lens is a positive lens, the fifth lens is a positive lens, the sixth lens is a negative lens, and the seventh lens is a positive lens; The eighth lens is a negative lens, the ninth lens is a positive lens, the tenth lens is a positive lens; the eleventh lens is a negative lens; the twelfth lens is a positive lens.

3. A 35mm full-frame camera lens with breath-free imaging as described in claim 1, characterized in that, The first lens is a negative lens with a biconcave shape, and the first curvature radius and the second curvature radius of the first lens satisfy the relationship: -1.5 < (L1 R2 + L1 R1) / (L1 R2 - L1 R1) < 0.5; Wherein, L1 R1 represents the first curvature radius, and L1 R2 represents the second curvature radius; Wherein, the first curvature radius is the curvature radius of the object side surface of the first lens, and the second curvature radius is the curvature radius of the image side surface of the first lens.

4. A 35mm full-frame camera lens with breath-free imaging as described in claim 1, characterized in that, The second lens is a meniscus positive lens bent towards the object side, and the focal length FG1 of the second lens and the total effective focal length f of the camera lens satisfy the relationship: 2.30 < FG1 / f < 4.

25.

5. A 35mm full-frame camera lens with breath-free imaging as described in claim 1, characterized in that, The first lens group includes a first doublet lens and a second doublet lens arranged from the object side to the image side, and the fourth curvature radius B1 R2 of the first doublet lens and the fifth curvature radius B2R1 of the second doublet lens satisfy the relationship: -6.74 < B1 R2 / B2R1 < -4.43, and the third curvature radius B1 R1 of the first doublet lens and the sixth curvature radius B2R2 of the second doublet lens satisfy the relationship: 5.53 < B2R2 / B1 R1 < 8.19; Wherein, the third curvature radius and the fourth curvature radius are respectively the curvature radii of the object side surface and the image side surface of the first doublet lens; the fifth curvature radius and the sixth curvature radius are respectively the curvature radii of the object side surface and the image side surface of the second doublet lens.

6. A 35mm full-frame camera lens with breath-free imaging as described in claim 1, characterized in that, The second lens group includes a biconvex positive lens with a biconvex shape, and the dispersion coefficient of the biconvex positive lens is greater than 68.

7. A 35mm full-frame camera lens with breath-free imaging as described in claim 6, characterized in that, The focal length FG2 of the biconvex positive lens and the total effective focal length f of the camera lens satisfy the following relationship: 0.68 <FG2 / f<1.61。 8. A 35mm full-frame camera lens with breath-free imaging as described in claim 1, characterized in that, The tenth lens is a meniscus positive lens curved towards the object side, and the focal length FG3 of the tenth lens satisfies the relationship f between the total effective focal length f of the camera lens and the equation: 1.73 <FG3 / f<3.53。 9. A 35mm full-frame camera lens with breath-free imaging as described in claim 1, characterized in that, The total effective focal length f of the camera lens and the focal length FG4 of the second lens group satisfy the following relationship: 0.89 <FG4 / f<1.81。 10. A 35mm full-frame camera lens with breath-free imaging as described in claim 1, characterized in that, The focal length FG5 of the first lens group and the focal length FG6 of the third lens group satisfy the relationship: 0.73 <FG1 / FG3<1.71。

Images