Lens and paraxial camera

Abstract

The utility model relates to the field of camera equipment, and provides a lens and a paraxial camera. The lens comprises a focusing lens barrel which can rotate and is used for realizing a focusing function, and one end face of the focusing lens barrel is provided with a yellow spot linkage inclined plane. According to the lens, the macular linkage inclined surface can be directly and integrally arranged on the end surface of the focusing lens barrel which has a rotational degree of freedom and is used for realizing a focusing function, so that macular linkage is realized through the macular linkage inclined surface, and the position of a macular image is synchronously adjusted along with the change of a focusing distance. Based on this, not only can the macular linkage be accurately realized, the synchronism and accuracy of focusing adjustment and macular position adjustment be improved, but also the complex mechanical structure of the existing lens for realizing the macular linkage can be simplified, so that the number of parts of the lens can be reduced, the structure of the lens can be simplified, the volume of the lens can be compressed, and the weight of the lens can be reduced. The portability and usability of the lens can be improved, and the production cost of the lens can be reduced.

Description

Technical Field

[0001] The present application belongs to the technical field of camera equipment, and in particular relates to a lens and a rangefinder camera. Background Art

[0002] The rangefinder camera's iris-reflective linkage technology is a unique focusing method that links the iris image in the viewfinder with the lens' focal point, enabling intuitive and precise manual focusing. However, the mechanical structure used to achieve iris-reflective linkage in existing lenses, including numerous components such as a linkage ring and adjustment screws, is complex, resulting in large and heavy lenses and poor portability. Utility Model Content

[0003] The embodiments of the present application provide a lens and a rangefinder camera, which aim to solve the problem that the mechanical structure of the existing lens used to achieve macula linkage has a large number of parts and a complex structure, resulting in a large size, heavy weight and poor portability of the lens.

[0004] To achieve the above objectives, the technical solutions adopted in the embodiments of the present application are:

[0005] In a first aspect, a lens is provided, comprising a rotatable focusing barrel for achieving a focusing function, wherein one end surface of the focusing barrel is provided with a macula-linked inclined surface.

[0006] In some embodiments, the macula-linked inclined surface occupies a portion of a corresponding end surface of the focusing lens barrel.

[0007] In some embodiments, the macula-linked inclined surface occupies 60% to 80% of the corresponding end surface of the focusing lens barrel.

[0008] In some embodiments, the macular linkage slope is spirally inclined from one end thereof to the other end thereof.

[0009] In some embodiments, the lens includes a fine-tuning gasket, which is disposed in the focusing barrel and is used to adjust the distance between the optical lens group in the focusing barrel and the flange surface.

[0010] In some embodiments, an inner peripheral wall of the focusing lens barrel is provided with a step portion.

[0011] In some embodiments, a plurality of step portions are provided, and the plurality of step portions are spaced apart along the axial direction of the focusing lens barrel.

[0012] In some embodiments, the step portion is provided on a side of the focusing lens barrel away from the macula-linked inclined surface.

[0013] In some embodiments, the lens includes a fixed lens barrel, the focusing lens barrel is sleeved in the fixed lens barrel and threadedly connected to the fixed lens barrel, and the focusing lens barrel can rotate and move axially relative to the fixed lens barrel.

[0014] In a second aspect, a rangefinder camera is provided, comprising the lens provided in an embodiment of the present application.

[0015] The beneficial effects of the lens provided by this application are:

[0016] The embodiments of the present application provide a lens that can be integrated with a macula linkage bevel directly on the end surface of a focus barrel that has rotational freedom and is used to implement a focusing function. This allows for macula linkage via the macula linkage bevel, allowing the position of the macula image to be adjusted synchronously with changes in the focus distance. This not only allows for precise macula linkage, improving the synchronization and accuracy of focus adjustment and macula position adjustment, but also simplifies the complex mechanical structure (including linkage rings, adjustment screws, etc.) used to implement macula linkage in existing lenses. This reduces the number of lens components, simplifies the lens structure, compresses the lens volume, reduces the lens weight, improves the lens's portability and usability, and reduces the lens's production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0018] Figure 1 This is a schematic diagram of the structure of the lens provided in some embodiments of the present application. The shaded area in the figure is only for illustrating the macula-linked inclined plane and has no other meaning.

[0019] Figure 2 for Figure 1 Exploded diagram of the provided lens;

[0020] Figure 3 for Figure 1 Schematic diagram of the lens structure provided Figure 2 ;

[0021] Figure 4 for Figure 3 Schematic diagram of the lens provided Figure 2 .

[0022] Among them, the reference numerals in the figures are:

[0023] 10-focusing lens barrel, 11-macular linkage inclined plane, 111-first end, 112-second end, 12-step portion, 20-fine-tuning gasket, 30-fixed lens barrel. DETAILED DESCRIPTION

[0024] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application clear and understandable, the application is described in detail below in conjunction with the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely used to explain this application and are not intended to limit this application. Unless otherwise specified, all embodiments and optional embodiments of this application can be combined with each other to form new technical solutions. Unless otherwise specified, all technical features and optional technical features of this application can be combined with each other to form new technical solutions.

[0025] In the description of this application, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0026] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of such features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0027] In this application, unless otherwise expressly specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components or interactions between two components. Those skilled in the art will understand the specific meanings of these terms in this application based on specific circumstances.

[0028] In the present application, “axial” refers to the extension direction of the central axis of the corresponding structure, “circumferential” refers to the circumferential direction of the outer peripheral surface of the corresponding structure, and “radial” refers to any diameter direction of the corresponding structure perpendicular to the central axis.

[0029] The viewfinder of a rangefinder camera features two viewing windows: one that displays the entire image, and a smaller window with a yellow filter that creates a yellow spot image (also known as the macula). As the photographer turns the focus ring on the lens, a mechanism within the lens deflects the reflective mirror in the macula, gradually aligning the macula's view with the object in the viewfinder. When the macula image perfectly overlaps the object in the viewfinder, the focus is perfectly focused. This unique macula-linked technology in rangefinder cameras allows for intuitive and precise manual focusing.

[0030] However, the mechanical structure of existing lenses used to achieve macula linkage includes many parts such as linkage rings and adjustment screws, and the structure is relatively complex, resulting in a large lens size, heavy weight, poor portability and high production cost.

[0031] Therefore, the embodiment of the present application provides a lens that combines macula linkage and focus movement into one, which can reduce the number of components, simplify the structure, compress the volume, reduce the weight, improve portability, and reduce production costs.

[0032] The following describes the specific implementation of this application in detail with reference to specific embodiments:

[0033] See also Figure 1 、 Figure 2 Some embodiments of the present application provide a lens, including a rotatable focusing barrel 10 for achieving a focusing function, wherein one end surface of the focusing barrel 10 is provided with a macula-linked inclined surface 11.

[0034] It should be noted that the focus barrel 10 is a component with rotational freedom and is used to achieve the focusing function. In some embodiments, the focus barrel 10 can rotate to drive its own axial movement, thereby driving the optical lens assembly (not shown in the figure, the optical lens assembly includes optical lenses) installed in the focus barrel 10 to move axially, thereby changing the focus distance of the lens and achieving the focusing function. In other embodiments, the focus barrel 10 can rotate without its own axial movement, thereby driving the optical lens assembly connected to the focus barrel 10 to move axially, thereby changing the focus distance of the lens and achieving the focusing function.

[0035] It should also be noted that one end surface of the focusing lens barrel 10 (specifically, the end surface facing the camera's macula) is provided with a macula-linked bevel 11. This bevel 11 is intended to contact the camera's macula. The "camera macula" herein refers to the rangefinder camera's macula-focusing system, including the yellow filter within the macula observation window, the reflector, and components associated with the reflector's deflection (e.g., the macula-linked rangefinder axis). The macula-linked bevel 11 can contact any physical component of the macula-focusing system, particularly components directly related to the positional changes of the macula image (e.g., the reflector, the macula-linked rangefinder axis, etc.).

[0036] Based on the correspondence between the macular image position and the focus distance, the macular-linked inclined surface 11 simulates the macular focus path that changes with the focus distance. The macular-linked inclined surface 11 may occupy the entire area of ​​the end surface of the focusing lens barrel 10, or a portion thereof. The macular-linked inclined surface 11 may be a slope that varies in a single direction, or a V-shaped slope, etc. The macular-linked inclined surface 11 may be an inclined plane, a nearly flat plane with a curved surface, or a complex slope that combines both a flat surface and a curved surface, etc. The specific configuration depends on the actual macular focus path.

[0037] Based on this, when the focusing barrel 10 rotates to change the focusing distance of the lens and realize the focusing function, the different slope areas of the macula linkage slope 11 will be rotated to face the macula and contact the macula, so that the position of the macula image can be synchronously adjusted with the change of the focusing distance, thereby realizing macula linkage.

[0038] The macula-linked inclined surface 11 may be formed by, but is not limited to, a CNC (Computer Numerical Control) machine tool (ie, a numerically controlled machine tool) (eg, by milling).

[0039] Thus, the embodiment of the present application provides a lens that can be directly integrated with a macula linkage bevel 11 on the end surface of a focus barrel 10 having rotational freedom and used to implement a focusing function. The macula linkage is achieved through the macula linkage bevel 11, and the position of the macula image is synchronously adjusted with changes in the focus distance. Based on this, not only can macula linkage be accurately achieved, the synchronization and accuracy of focus adjustment and macula position adjustment can be improved, but the complex mechanical structure (including linkage rings, adjustment screws, etc.) used to achieve macula linkage in existing lenses can also be simplified, thereby reducing the number of lens components, simplifying the lens structure, compressing the lens volume, reducing the lens weight, improving the portability and usability of the lens, and reducing the production cost of the lens.

[0040] See also Figure 1 、 Figure 2In some embodiments of the present application, the macula-linked inclined surface 11 occupies a portion of the corresponding end surface of the focusing lens barrel 10 .

[0041] It should be noted that, because the focusing lens barrel 10 is a cylindrical structure, the corresponding end surface of the focusing lens barrel 10 (i.e., the end surface provided with the macula-linked inclined surface 11) is an annular end surface. In this embodiment, the macula-linked inclined surface 11 occupies a portion of the corresponding end surface of the focusing lens barrel 10, i.e., the macula-linked inclined surface 11 is an arc-shaped surface.

[0042] By adopting the above-mentioned solution, by setting the macula linkage bevel 11 to occupy a portion of the corresponding end surface of the focusing lens barrel 10 rather than the entire end surface, on the one hand, the setting position of the macula linkage bevel 11 on the corresponding end surface of the focusing lens barrel 10 can be accurately planned and designed according to the actual macula focusing path, and the extension length of the macula linkage bevel 11 along the circumference of the focusing lens barrel 10 can be accurately planned and designed, thereby facilitating the precise matching of the macula linkage bevel 11 with the camera macula, improving the macula linkage effect achieved by the macula linkage bevel 11, and improving focusing accuracy. On the other hand, compared to the solution of "the macula linkage bevel 11 occupying the entire corresponding end surface of the focusing lens barrel 10", the macula linkage bevel 11 of this embodiment is less difficult to manufacture, thereby improving the manufacturing convenience, manufacturing efficiency and manufacturing accuracy of the macula linkage bevel 11 and the focusing lens barrel 10, and reducing manufacturing costs.

[0043] Of course, in other embodiments, the macula linkage inclined surface 11 may occupy the entire corresponding end surface of the focusing lens barrel 10 according to the actual macula focusing path.

[0044] See also Figure 1 、 Figure 2 In some embodiments of the present application, the macula-linked inclined surface 11 occupies 60% to 80% of the corresponding end surface of the focusing lens barrel 10 .

[0045] It should be noted that the macula-linked bevel 11 occupies a portion of the corresponding end surface of the focusing lens barrel 10, and the macula-linked bevel 11 accounts for 60% to 80% of the corresponding end surface of the focusing lens barrel 10, for example, the proportion can be 60%, 65%, 70%, 75%, 80%, etc.

[0046] By adopting the above solution, by making the macula linkage bevel 11 occupy 60% to 80% of the corresponding end surface of the focusing lens barrel 10, on the one hand, the macula linkage bevel 11 can occupy a sufficient proportion on the corresponding end surface of the focusing lens barrel 10, and the setting area of ​​the macula linkage bevel 11 and the extension length of the macula linkage bevel 11 along the circumference of the focusing lens barrel 10 can be sufficient to meet the needs of macula linkage, thereby improving the macula linkage effect achieved by the macula linkage bevel 11, improving the accuracy of macula linkage, and improving focusing accuracy. On the other hand, on the basis of meeting the needs of macula linkage, the proportion of the macula linkage bevel 11 on the corresponding end surface of the focusing lens barrel 10 can be accurately controlled to reduce the processing amount of the macula linkage bevel 11, thereby reducing the processing difficulty of the focusing lens barrel 10, improving the processing convenience, processing efficiency and processing accuracy of the focusing lens barrel 10, and reducing the processing cost.

[0047] See also Figure 1 、 Figure 2 In some embodiments of the present application, the macula-linked inclined plane 11 is spirally inclined from one end thereof to the other end thereof.

[0048] It should be noted that the macula linkage slope 11 is arranged to be spirally inclined from one end to the other end, that is, the macula linkage slope 11 is not simply arranged to be inclined in a straight line, but is gradually inclined along a spiral line, that is, the trajectory of the macula linkage slope 11 changes like a spiral line. The macula linkage slope 11 is an inclined surface with a curved surface that is approximately flat. For example, Figure 1 、 Figure 2 As shown, one end of the macula linkage bevel 11 is the first end 111, and the other end of the macula linkage bevel 11 is the second end 112. The second end 112 is spirally inclined relative to the first end 111 "along the circumferential direction of the focusing barrel 10" and "along the direction close to the end surface of the focusing barrel 10 where the macula linkage bevel 11 is not provided."

[0049] By adopting the above solution, by spirally tilting the macula-linked inclined surface 11 from one end to the other, the macula-linked inclined surface 11 can smoothly and precisely move the macula image as the focus barrel 10 rotates during focus adjustment. This enables the macula-linked inclined surface 11 to provide delicate focus adjustment capabilities and a precise macula-linked effect, thereby improving focus accuracy. Furthermore, compared to a linearly tilted inclined surface, a spirally tilted inclined surface is less likely to cause jitter or vibration during rotation, thereby improving the stability and reliability of the macula-linked effect.

[0050] Of course, in other embodiments, according to the actual macula focusing path, the macula linkage inclined plane 11 can be designed as an inclined plane arranged to be straight and inclined in one direction, or can be designed as an inclined plane similar to a V-shape, and so on.

[0051] See also Figure 2 、 Figure 3 、 Figure 4 In some embodiments of the present application, the lens includes a fine-tuning gasket 20, which is provided in the focusing barrel 10 and is used to adjust the distance from the optical lens group in the focusing barrel 10 to the flange surface.

[0052] It should be noted that there is a corresponding relationship between the macular image position and the focus distance. In some cases, the macular image position and the focus distance may not be aligned. To address this situation, fine-tuning shims 20 can be added or removed from the focus barrel 10 (the number and position of the fine-tuning shims 20 can be set as needed) to fine-tune the axial distance between the optical lens assembly in the focus barrel 10 and the flange surface based on the fine-tuning shims 20, thereby changing the focus position and focus distance. The focus position and focus distance are repeatedly fine-tuned in this way until the focus distance and the macular image position are accurately aligned and aligned, and the calibration operation is completed. Among them, the "flange surface" is the reference surface at the lens interface, that is, the plane where the lens is connected to and contacts the camera body frame.

[0053] By adopting the above solution, if the macular image position and focus distance are not aligned, the focus position and focus distance can be changed by adding or removing fine-tuning shims 20 within the focus barrel 10. Based on the fine-tuning shims 20, the axial distance between the optical lens assembly within the focus barrel 10 and the flange surface can be fine-tuned, thereby changing the focus position and focus distance until the focus distance and macular image position are precisely aligned. Based on this, the focus distance and macular image position can be calibrated conveniently and quickly, improving the accuracy of the correspondence between the macular image position and the focus distance, improving the focus precision and accuracy, and increasing the reliability and service life of the lens.

[0054] Of course, in other embodiments, if the focus distance and the macula image position are precisely aligned and no calibration is required, the focusing lens barrel 10 may not include the fine-tuning spacer 20 .

[0055] See also Figure 3 、 Figure 4 In some embodiments of the present application, a step portion 12 is provided on the inner peripheral wall of the focusing lens barrel 10 .

[0056] It should be noted that the inner circumferential wall of the focusing lens barrel 10 can be formed with a stepped portion 12 based on a protrusion or a depression. One or more stepped portions 12 can be provided on the inner circumferential wall of the focusing lens barrel 10. The stepped portion 12 can serve as a positioning reference for components such as the optical lens assembly and the fine-tuning spacer 20 disposed within the focusing lens barrel 10, thereby stabilizing the position of the corresponding components within the focusing lens barrel 10. The stepped portion 12 can extend along the circumference of the focusing lens barrel 10 in a complete ring shape, or it can extend along the circumference of the focusing lens barrel 10 in an arc shape.

[0057] By adopting the above solution, a step portion 12 can be provided on the inner peripheral wall of the focusing lens barrel 10 to facilitate positioning and installing components such as the optical lens assembly and the fine-tuning shim 20 via the step portion 12. This facilitates accurate and stable installation positions and installation states of the optical lens assembly, the fine-tuning shim 20, and other components within the focusing lens barrel 10, thereby improving the structural stability, structural reliability, and performance stability of the lens. In particular, positioning and installing the fine-tuning shim 20 via the step portion 12 facilitates stabilizing the installation position and installation state of the fine-tuning shim 20 relative to the optical lens assembly and the focusing lens barrel 10, thereby stabilizing the fine-tuning effect of the fine-tuning shim 20 on "focus position and focus distance", stabilizing the calibration effect of "focus distance and macular image position", and improving focusing precision and accuracy.

[0058] Of course, in other embodiments, the inner wall of the focusing barrel 10 may not be provided with the step portion 12 , but other methods may be used to stabilize the installation position and installation state of components such as the optical lens assembly and the fine-tuning spacer 20 in the focusing barrel 10 .

[0059] See also Figure 3 、 Figure 4 In some embodiments of the present application, a plurality of step portions 12 are provided, and the plurality of step portions 12 are spaced apart along the axial direction of the focusing lens barrel 10 .

[0060] By adopting the above solution, multiple steps 12 spaced axially along the focusing barrel 10 can be used to provide multiple levels of positioning and support points, allowing the optical lens assembly, fine-tuning spacers 20, and other components to be installed in the focusing barrel 10 in a layered, precisely positioned, and secure manner according to preset positions. This improves the installation stability and accuracy of the optical lens assembly, fine-tuning spacers 20, and other components within the focusing barrel 10, thereby improving the structural stability, reliability, and performance stability of the lens. Furthermore, the design of multiple steps 12 also provides more flexibility in the layout of the fine-tuning spacers 20, making it easier to add or remove fine-tuning spacers 20 from different steps 12 as needed to achieve fine adjustment of "correspondence and alignment of the focus distance with the macular image position," that is, to achieve fine calibration.

[0061] Of course, in other embodiments, the inner peripheral wall of the focusing lens barrel 10 may be provided with only one step portion 12 .

[0062] See also Figure 2 、 Figure 3 、 Figure 4 In some embodiments of the present application, the step portion 12 is provided on a side of the focusing barrel 10 away from the macula-linked inclined surface 11. That is, the step portion 12 is provided relatively close to the end surface of the focusing barrel 10 where the macula-linked inclined surface 11 is not provided.

[0063] By adopting the above solution, the layout of the step portion 12 can be optimized, so that the step portion 12 can be mainly used to position and install components such as the optical lens group and the fine-tuning gasket 20 that are "located away from the macula-linked inclined plane 11". This can facilitate the disassembly, assembly and replacement of the optical lens group and the addition and removal of the fine-tuning gasket 20 from the side of the focusing barrel 10 away from the macula-linked inclined plane 11, thereby facilitating assembly and calibration operations.

[0064] Of course, in other embodiments, the position of the step portion 12 on the inner circumferential wall of the focusing lens barrel 10 can be set as needed.

[0065] See also Figure 1 、 Figure 2 In some embodiments of the present application, the lens includes a fixed lens barrel 30, the focusing lens barrel 10 is sleeved in the fixed lens barrel 30 and threadedly connected to the fixed lens barrel 30, and the focusing lens barrel 10 can rotate and move axially relative to the fixed lens barrel 30.

[0066] It should be noted that the fixed lens barrel 30 is a cylindrical structure fixed relative to the lens body. The fixed lens barrel 30 cannot rotate about its central axis, that is, it has no rotational freedom. The focusing lens barrel 10 is sleeved within the fixed lens barrel 30. The outer peripheral wall of the focusing lens barrel 10 is provided with an external thread, and the inner peripheral wall of the fixed lens barrel 30 is provided with an internal thread. The focusing lens barrel 10 and the fixed lens barrel 30 are threadedly connected. Because the fixed lens barrel 30 cannot rotate about its central axis, based on the threaded connection between the focusing lens barrel 10 and the fixed lens barrel 30, the rotation of the focusing lens barrel 10 relative to the fixed lens barrel 30 can drive the focusing lens barrel 10 to move axially relative to the fixed lens barrel 30.

[0067] By adopting the above solution, when the fixed lens barrel 30 is fixed relative to the lens body and does not have rotational freedom, the focusing lens barrel 10 is threadedly connected to the fixed lens barrel 30, so that the rotation of the focusing lens barrel 10 relative to the fixed lens barrel 30 can drive the focusing lens barrel 10 to move axially relative to the fixed lens barrel 30. Based on this, the focusing lens barrel 10 can rotate and move axially relative to the fixed lens barrel 30, thereby driving the optical lens assembly installed in the focusing lens barrel 10 to move axially, thereby changing the focusing distance of the lens. As a result, the lens can achieve focus adjustment and macula linkage with a simplified structure, thereby improving the convenience, precision, and accuracy of focus adjustment.

[0068] Of course, in other embodiments, the focusing barrel 10 can rotate without moving axially, so as to drive the optical lens assembly connected to the focusing barrel 10 to move axially, thereby changing the focusing distance of the lens and achieving the focusing function.

[0069] See also Figure 1Some embodiments of the present application provide a rangefinder camera, including a lens provided in an embodiment of the present application. The lens provided in an embodiment of the present application can be mounted on a main frame of the rangefinder camera.

[0070] By adopting the above solution, the rangefinder camera can achieve macula linkage by adopting the lens provided in the embodiment of the present application, reduce the number of parts, simplify the structure, compress the volume, reduce the weight, improve portability and usability, and reduce production costs.

[0071] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements or improvements made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A lens, characterized in that: It comprises a rotatable focusing barrel for realizing a focusing function, wherein one end surface of the focusing barrel is provided with a macula linkage inclined surface, the macula linkage inclined surface occupies a part of the corresponding end surface of the focusing barrel, and the macula linkage inclined surface is spirally inclined from one end to the other end.

2. The lens according to claim 1, wherein: The macula-linked inclined surface occupies 60% to 80% of the corresponding end surface of the focusing lens barrel.

3. The lens according to claim 1, wherein: The lens comprises a fine-tuning gasket, which is arranged in the focusing barrel and is used to adjust the distance between the optical lens group in the focusing barrel and the flange surface.

4. The lens according to claim 1, wherein: The inner peripheral wall of the focusing lens barrel is provided with a step portion.

5. The lens according to claim 4, wherein: There are a plurality of step portions, and the plurality of step portions are spaced apart along the axial direction of the focusing lens barrel.

6. The lens according to claim 4, wherein: The step portion is arranged on a side of the focusing lens barrel away from the macula linkage inclined surface.

7. The lens according to any one of claims 1 to 6, wherein: The lens comprises a fixed lens barrel, the focusing lens barrel is sleeved in the fixed lens barrel and threadedly connected with the fixed lens barrel, and the focusing lens barrel can rotate and move axially relative to the fixed lens barrel.

8. A rangefinder camera, characterized in that: The lens comprises the lens as claimed in any one of claims 1 to 7.

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