Bright medium-range telephoto lens

Details Bright medium-range telephoto lens Bright medium-range telephoto lens

1983-09-13

1985-04-02

Corbin, John K.

350464, G02B 962, G02B 1302

Patent

active

045084343

ABSTRACT:
A bright medium-range telephoto lens comprises, in order from an object, a first positive lens having a stronger positive power toward the object, a second positive-meniscus lens having a stronger positive power toward the object, a third negative-meniscus lens having a stronger negative power toward an image, a compound lens spaced from the third lens with an aperture interposed therebetween and having a fourth negative lens having a stronger negative power toward the object and a fifth positive lens having a stronger positive power toward the image, a sixth positive lens, and a seventh positive lens having a weak power.

REFERENCES:
patent: 3948584 (1976-04-01), Basista et al.

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