Super-large-aperture wide-angle lens of single lens reflex camera

Abstract

The invention discloses a super-large-aperture wide-angle lens of a single lens reflex camera.The super-large-aperture wide-angle lens comprises an optical lens which sequentially comprises 11 lenses from the object side to the image side; the first lens has negative power, and the object side face of the first lens is a convex face; the second lens has negative power, and the object side face of the second lens is a concave face; the third lens has positive power, and the object side face of the third lens is a plane; the fourth lens has positive power, and the object side face of the fourth lens is a convex face; the fifth lens has positive power, and the object side face of the fifth lens is a convex face; the sixth lens has negative power, and the object side face of the sixth lens is a convex face; the seventh lens has negative power, and the object side face of the seventh lens is a concave face; the eighth lens has positive power, and the object side face of the eighth lens is a convex face; the ninth lens has positive power, and the object side face of the ninth lens is a convex face; the tenth lens has negative power, and the object side face of the tenth lens is a convex face; the eleventh lens has positive power, and the object side face of the eleventh lens is a convex face.The super-large-aperture wide-angle lens of the single lens reflex camera can correct various aberrations and is compact in structure, good in imaging effect, long in back focal length, low in cost and high in cost performance ratio.

Description

technical field [0001] The invention relates to the field of wide-angle lenses for single-lens reflex cameras, in particular to a super-large aperture full-frame lens for digital single-lens reflex cameras with a specification of 35mm F1.2. Background technique [0002] In digital camera equipment, there is a gap in the production and design of domestic lenses. With the development of photography technology and the improvement of people's living standards, the number of photography enthusiasts increases, and the demand for this aspect also increases. Among the existing full-frame lens designs, such as the 35mm lenses produced by Nikon, Canon, Sigma and other manufacturers, the maximum aperture is only F1.4, and all of the above use aspherical lenses, the price is high, and the cost performance is low. is a heavy economic burden. [0003] Therefore, there are defects in the prior art and need to be improved. Contents of the invention [0004] The technical problem to be s...

AI Technical Summary

Problems solved by technology

Among the existing full-frame lens designs, such as the 35mm lenses produced by Nikon, Canon, Sigma and other manufacturers, the maximum aperture is only F1.4, and all of the above use aspherical lenses, the price is high, and the cost performance is low. is a heavy financial burden

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