Interchangeable eye piece-housing

Details Interchangeable eye piece-housing Interchangeable eye piece-housing

1979-04-27

1981-07-21

Truhe, J. V.

354223, 354219, G03B 1308, G03B 1912

Patent

active

042794897

ABSTRACT:
A single lens reflex camera having a Keplerian telescope type eye level finder optical system and the display of data in a viewfinder, the data display is provided on the second focus surface of the optical system or in the vicinity thereof. A interchangeable eye piece housing uses a mount device having a camera side mount and an eye piece side mount provided between the second focus surface and an eye level eye piece of the optical system. An eye level eye piece housing and a waist level eye piece housing are interchangeably mounted on the camera side mount. The eye level eye piece housing comprises an eye level eye piece and an eye piece side mount. A waist level eye piece housing comprises a waist level eye piece, a waist level prism or two mirrors having two reflection surfaces perpendicular to a plane including an exit optical axis extended from the camera side mount and the optical axis of the waist level eye piece to change the direction of the exit optical axis so that the exit optical axis is extended into the waist level eye piece.

REFERENCES:
patent: 1267596 (1918-05-01), Schleinzer
patent: 4131354 (1978-12-01), Hagiwara

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