Large-aperture telephoto lens

Details Large-aperture telephoto lens Large-aperture telephoto lens

1982-09-21

1984-05-08

Corbin, John K.

G02B 1302, G02B 962

Patent

active

044471378

ABSTRACT:
A large-aperture telephoto lens comprising seven lens elements in six lens components, the first lens component having a positive lens, the second lens component having a doublet composed of a negative-meniscus lens with its concave side facing an image and a positive-meniscus lens, the third lens component having a negative-meniscus lens with its concave side facing the image, the fourth lens having a meniscus lens with its concave side facing an object, the fifth lens component having a positive-meniscus lens with a surface of a larger curvature facing the object, and the sixth lens component having a positive lens.

REFERENCES:
patent: 3997248 (1976-12-01), Fujii
patent: 4240699 (1980-12-01), Sato et al.

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