1984-10-26
1986-11-25
Mathews, A. A.
354156, 354212, 354219, 354295, G03B 1302, G03B 1750, G03B 1912
Patent
active
046245413
ABSTRACT:
A single lens reflex camera which can be modified to also function as a mid-format, more sophisticated camera which comprises a main camera body containing a film advancing lever, a film storage shaft and a film advancing shaft which connects with the film advancing lever, the film advancing shaft containing film sprockets which are adapted to engage and advance the film through the camera through the operation of the film advancing lever, a lens system containing a reflecting mirror, a film back attachment housing adapted to be connected to the back of the main camera body, the film back attachment housing changing the film plane from that of a single lens reflex camera to that of a mid-format camera, the film back attachment housing containing a film advancing system for conveyihng 120 mm or 220 mm film across said changed film plane, a gear system providing communication between the film advancing shaft and the film advancing system of the film back attachment housing whereby the film in the film back attachment housing can be advanced across the changed film plane by the operation of the film advancing lever, and an adjustable view finder which is adjustable to accommodate the film planes of both the single lens reflex camera and the mid-format camera, so that the distance from the center of the mirror to the desired film plane is equal to the distance from the center of the mirror to the focusing screen.
REFERENCES:
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patent: 4374614 (1983-02-01), Kobayashi
patent: 4435060 (1984-03-01), Kobayashi
patent: 4482230 (1984-11-01), Magariyama et al.
patent: 4531818 (1985-07-01), Bally
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