Rear conversion lens

Details Rear conversion lens Rear conversion lens

1977-03-02

1979-05-15

Sacher, Paul A.

350176, 350214, 350215, 350216, 350220, G02B 1512, G02B 964

Patent

active

041545087

ABSTRACT:
A rear conversion lens system to be mounted on the image side of a photographic lens to enlarge the total focal length of the entire lens system including the photographic lens comprises a diverging group and a converging group disposed on the image side of the diverging group. The diverging group includes, as viewed in order from the object side, a first positive lens component, a negative lens component and a second positive lens component. The converging group includes, as viewed in order from the object side, a positive lens component and a negative lens component.

REFERENCES:
patent: 2827835 (1958-03-01), Schude
patent: 3848969 (1974-11-01), Tajima
patent: 3877796 (1975-04-01), Yabe et al.

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