Photography – Bellows objective camera – Camera front or lens mount angularly adjustable
Patent
1995-04-24
1997-06-17
Gray, David M.
Photography
Bellows objective camera
Camera front or lens mount angularly adjustable
396350, 396437, G03B 1702
Patent
active
056406304
ABSTRACT:
A multi-stage focus box camera is disclosed which comprises a tubular body open at both ends formed of a dimensionally stable, light weight material. A lens board and lens extender assembly slides over one end of the camera body and is adapted for slidingly carrying a lens mount for a lens. A film board fits over the opposite end of the camera body and is adapted to receive a film holder which closes the back side of the body and which defines a film support for sheet film. In addition the film board may include a viewing device, such as a ground glass plate in place of the film board, by which an image may be focused. Both the lens board and lens extender assembly and the film board are slidable on the camera body and are movable between retracted and extended positions to provide different focus stages for the camera. In addition the lens board and lens extender assembly and the film board can be moved on the camera body to position the lens body to adjust the depth of field by slanting these components.
REFERENCES:
patent: 154607 (1874-09-01), Holmes
patent: 3825938 (1974-07-01), Koch
patent: 4733257 (1988-03-01), Ziegler
patent: 5289215 (1994-02-01), Clairmont et al.
Gray David M.
Vanderburgh John E.
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