Large aperture ratio interchangeable lens for a single lens refl

Details Large aperture ratio interchangeable lens for a single lens refl Large aperture ratio interchangeable lens for a single lens refl

1979-09-11

1981-08-11

Gonzales, John

354 46, G03B 902

Patent

active

042831334

ABSTRACT:
A large aperture ratio interchangeable lens for a single lens reflex camera comprises a lens body, a preset aperture ring provided for rotation with respect to the lens body, a first signal member operatively associated with the preset aperture ring to transmit a corrected difference signal (f-f.sub.O -.DELTA.f) to the camera body, and a second signal member for transmitting a corrected open value signal (f.sub.O +.DELTA.f) to the camera body.

REFERENCES:
patent: 3683765 (1972-08-01), Iura
patent: 3896462 (1975-07-01), Taguchi et al.
patent: 4118726 (1978-10-01), Kuramoto et al.

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