WIDE-ANGLE HIGH-POWER OBJECT LENS Russian patent published in 2021 - IPC G02B9/60 

FIELD: photographic equipment.

SUBSTANCE: invention can be used as a photographic lens in SLR cameras. The lens contains two components, separated by an aperture diaphragm. The first component is positive and includes a negative meniscus facing the object space with the convexity, and a positive glued doublet consisting of a biconvex lens and a negative meniscus facing the object space by the concavity, the second component is positive and includes a biconcave lens, a positive meniscus facing the object space by the concavity, and a biconvex lens.

EFFECT: increase in relative aperture while maintaining high image quality and the scope of the angular field of view.

2 cl, 2 dwg, 1 tbl