Rear conversion lens

Details Rear conversion lens Rear conversion lens

1984-08-15

1985-04-30

Corbin, John K.

350454, G02B 1302

Patent

active

045140510

ABSTRACT:
A rear conversion lens for a single lens reflex camera, constructed with a front lens group including a positive lens with its surface having a greater curvature facing to the image side, a negative biconcave lens, and a positive lens with its surface having a greater curvature facing to the object side, and a rear lens group including a negative lens, the rear conversion lens being provided between an objective lens and a camera body to extend a composite focal length, and satisfying certain conditions.

REFERENCES:
patent: 4154508 (1979-05-01), Nakamura
patent: 4206971 (1980-06-01), Hamanishi et al.

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