WIDE-ANGLE HIGH-POWER OBJECTIVE Russian patent published in 2018 - IPC G02B9/64 

FIELD: photography.

SUBSTANCE: invention can be used as a photographic objective. Objective consists of two components separated by an air gap. First component in the course of the rays consists of a negative meniscus, which is turned by convexity to the space of objects, a plane-convex lens, turned by a plane to the space of objects, positive meniscus, turned by a convex surface to the space of objects, a positive meniscus, facing by a concave surface to the space of objects. Second component consists of a biconcave lens, a positive meniscus, which is turned by a convex surface to an image space, plane convex lens facing the convex surface to the image space. Correlations given in the claim are satisfied.

EFFECT: increase in the relative ratio, an increase in the angular field and an increase in manufacturability.

1 cl, 1 dwg, 1 tbl