Water-resistant camera with automatic internal air-pressure adju

Details Water-resistant camera with automatic internal air-pressure adju Water-resistant camera with automatic internal air-pressure adju

1987-03-25

1988-08-09

Gellner, Michael L.

G03G 1708

Patent

active

047631457

ABSTRACT:
A water-resistant camera has a lens barrel movable toward and away from a fluid-tight camera body for selecting the position of the lens barrel between wide-angle and telephoto positions. The camera has or can be combined with an automatic air-pressure adjusting mechanism for automatically keeping the air pressure in the inner space of the camera at a substantially constant level irrespective of the position of the lens barrel between the wide-angle position and the telephoto position. Therefore, the lens barrel can smoothly be moved with respect to the camera body upon switching between the wide-angle and telephoto positions.

REFERENCES:
patent: 1131712 (1915-03-01), Klein
patent: 4653883 (1987-03-01), Maeno

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