Photography – Having lens converter or extension tube
Patent
1994-11-08
1997-07-29
Metjahic, Safet
Photography
Having lens converter or extension tube
396132, G03B 1700
Patent
active
056529210
ABSTRACT:
A system for controlling an aperture of a lens including an adapter for mounting the lens onto a camera body. The adapter includes a ring having an internal gear, and an aperture control bar formed on the ring. Another gear is provided which meshes with the internal gear. The aperture control bar contacts an aperture control lever of the lens, while the other gear is driven by a motor driven AF coupler of the camera body to rotate the ring. The rotation of the ring rotates the aperture control bar, which moves the aperture control lever of the lens. The size of the aperture of the lens is changed when the aperture control bar is moved.
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"Pentax Adapter K for 645 Lens", printed May 1984.
Asahi Kogaku Kogyo Kabushiki Kaisha
Mahoney Christopher E.
Metjahic Safet
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