Photographic lens system

Details Photographic lens system Photographic lens system

1988-04-28

1989-03-07

Corbin, John K.

350469, G02B 1318, G02B 934

Patent

active

048100749

ABSTRACT:
The present invention provides a photographic lens system comprising from the object side to the image side; a first lens element of a positive meniscus lens convex to the object side; a second lens element of a bi-concave lens; a third lens element of a bi-convex lens; a fourth lens element of a negative meniscus lens concave to the object side; and an aperture diaphragm; wherein the lens system fulfills the following conditions:

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patent: 4606607 (1986-08-01), Kurihara
patent: 4695134 (1987-09-01), Nakayama et al.

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