Pressure ring and teleconverter with same

Abstract

The invention discloses a pressure ring and a teleconverter with the same. The teleconverter comprises a mirror unit, an extension ring and a pressure ring, wherein an inner ring of the pressure ring is provided with guide sliding ways for mounting fixing rods of the mirror unit, a contact nick part is formed in the upper edge of the pressure ring, at least two grooves are formed in the upper surface of the pressure ring, and screw holes are formed in the bottoms of the grooves. Screws penetrate through the grooves in the pressure ring and elastic bodies in the grooves to fix the pressure ring on the extension ring. According to the pressure ring and the teleconverter with the same, the mirror unit is mounted in the extension ring through the guide sliding ways to achieve the function of the teleconverter, and can be removed to be used as the extension ring, so that functions of a teleconverter / micro lens are integrated, the cost is reduced, and convenience in carrying is achieved; the special structure of the pressure ring is matched with the elastic bodies, so that the mirror unit is simply and rapidly assembled and disassembled.

Description

technical field [0001] The invention belongs to the field of photography and camera equipment, and in particular relates to a pressure ring and a teleconverter equipped with the pressure ring. Background technique [0002] During the shooting process, photographers sometimes need to shoot distant scenes, and sometimes need macro photography. For telephoto, you can extend the focal length by connecting an external teleconverter between the body and the lens. For macro photography, you can use a close-up ring to change the image distance by increasing the length of the lens barrel to achieve the purpose of magnification. At present, the traditional teleconverter lens group and housing on the market are fixed, and only have the function of teleconverter. If the user wants to take macro photos, he needs to purchase a professional close-up extension ring, which not only requires additional economic expenditure, It is also very inconvenient to carry two devices. Contents of the...

AI Technical Summary

Problems solved by technology

[0003] Aiming at the defect that the traditional teleconverter and the close-up ring have single functions, and can only realize the function of extending the focal length or changing the distance, the present invention proposes a teleconverter / macro two-in-one teleconverter, through the pressure ring The special structure realizes the simple and convenient disassembly and assembly of the close-up ring and the lens group, and realizes the effect of extending distance or macro shooting; and the lens group can be fixed in the close-up ring without shaking to ensure the shooting effect

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