WIDE-ANGLE FAST OBJECTIVE Russian patent published in 2022 - IPC G02B9/64 G02B9/12 

FIELD: optics.

SUBSTANCE: objective can be used as a photographic lens in mirrorless photographic equipment. The objective comprises three components, wherein the second one and the third one are separated by an aperture diaphragm. The first component is negative and comprises a negative meniscus facing the object space with the convex side thereof. The second component is positive and comprises a first singular double-convex lens, a negative meniscus facing the object space with the concave side thereof, a second singular double-convex lens, and a double-adhered meniscus facing the object space with the convex side thereof and consisting of a double-convex lens and a double-concave lens. The third component is positive and comprises a first and a second singular double-convex lenses and a negative meniscus facing the object space with the convex side thereof.

EFFECT: increase in the speed of the objective and increase in the manufacturability due to the reduction in the number of lenses and elimination of the use of aspherical surfaces with the maintained high image quality and size of the linear field of the image.

3 cl, 2 dwg, 1 tbl