Variable focus camera

Details Variable focus camera Variable focus camera

1988-10-04

1990-10-23

Mathews, A. A.

35419512, 3541491, 35414911, 354222, G03B 1312, G03B 1505

Patent

active

049656155

ABSTRACT:
A variable focus camera includes a photographing lens constituted by at least two components, and changes the position of a magnification adjusting lens of a finder by a cam barrel of the photographing lens. In this camera, at least two magnification correction cams for extending the components of the photographing lens and having a focal-point correction function are formed on the cam barrel, and a magnification of the photographing lens is caused to coincide with a magnification of the finder by the magnification correction cams.

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patent: 2995061 (1961-08-01), Briskin et al.
patent: 3200699 (1965-08-01), Graves
patent: 3798668 (1974-03-01), Hartmann
patent: 3882514 (1975-05-01), Graham
patent: 4195924 (1980-04-01), Stemme et al.
patent: 4423940 (1984-01-01), Kashihara et al.
patent: 4652104 (1987-03-01), Harvey
patent: 4847647 (1989-07-01), Ueda

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