Mirror reflex camera with electronic rangefinder

Details Mirror reflex camera with electronic rangefinder Mirror reflex camera with electronic rangefinder

1978-06-20

1980-02-12

Gellner, Michael L.

354155, 354166, G03B 310, G03B 1306, G03B 1316

Patent

active

041881028

ABSTRACT:
A mirror reflex camera having a pentaprism and an electronic rangefinder is improved by displacing the viewer axis by an angle up to 5.degree. downward with respect to the optical axis of the picture taking lens. This is accomplished by modifying the pentaprism to have a fully specular concave mirror (7b) at the lower edge of the exit surface of pentaprism (7) and by selecting the angular dimensions of the pentaprism (7) so that the viewer axis (8a) deviates by an angle beta up to 5.degree. downward with respect to the optical axis (8) which is horizontal in the ordinary operational position of the camera, and by having ocular (6) offset upward and so slanted with respect to its position when the optic axis (8) is horizontal that the ocular axis (6a) subtends an angle alpha up to 5.degree. with the optic axis (8).

REFERENCES:
patent: 3781110 (1973-12-01), Leitz et al.
patent: 3953728 (1976-04-01), Leitz et al.

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