Mirror system for a single lens reflex camera

Details Mirror system for a single lens reflex camera Mirror system for a single lens reflex camera

1987-12-04

1988-10-11

Mathews, A. A.

354152, G03B 1912

Patent

active

047775025

ABSTRACT:
In a single lens reflex camera, a mirror can be positioned at an angle between the rear of the taking lens and the film to reflect the light rays that come through the lens, on to a spaced prism and eyelens of the viewfinder, and it can be positioned out of the way to expose the film. The mirror is supported to swing in an arc about a single axis from its light-reflecting position to a non-reflecting position vertically arranged between the prism and the eyelens. This kind of movement of the mirror advantageously permits the back focus of the taking lens required to clear the mirror for its movement to be reduced.

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