Photographic lens system with a short overall length

Details Photographic lens system with a short overall length Photographic lens system with a short overall length

1974-12-04

1976-04-20

Sacher, Paul A.

350176, 350225, G02B 304, G02B 912

Patent

active

039515230

ABSTRACT:
A photographic lens system with a short overall ##EQU1## COMPRISING THREE LENS COMPONENTS OF FOUR LENSES FROM A FIRST THROUGH THIRD LENS COMPONENTS, AT LEAST THE SURFACE ON THE IMAGE SIDE OF SAID THIRD LENS COMPONENT BEING AN ASPHERICAL SURFACE EXPRESSED BY THE FOLLOWING FORMULA

REFERENCES:
patent: 1616765 (1927-02-01), Sonnefeld

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