Variable magnification finder

Details Variable magnification finder Variable magnification finder

1988-11-01

1990-03-20

Sugarman, Scott J.

350427, 350432, 354222, 354225, G02B 1514, G02B 1318, G03B 1308, G03B 1310

Patent

active

049096141

ABSTRACT:
A finder optical system provided separately from a photographic lens having a variable magnification portion comprises, from front to rear, an objective lens unit having a first variable magnification portion, a Porro prism and an eyepiece lens unit having a second variable magnification portion. And, a first magnification change of the first variable magnification portion is achieved in association with the variable magnification portion of the photographic lens, and a second magnification change of the second variable magnification portion is achieved in association with trimming shot information.

REFERENCES:
patent: 4249793 (1981-02-01), Uehara
patent: 4715692 (1987-12-01), Yamada et al.
patent: 4725130 (1988-02-01), Ozawa
patent: 4757336 (1988-07-01), Nakayama et al.
patent: 4779969 (1988-10-01), Sato et al.
patent: 4812023 (1989-03-01), Kikuchi
patent: 4834513 (1989-05-01), Nozawa
patent: 4842395 (1989-06-01), Sato et al.

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