Viewfinder for a camera with changeable focal length

Details Viewfinder for a camera with changeable focal length Viewfinder for a camera with changeable focal length

1988-05-27

1989-12-12

Mathews, A. A.

35419512, 354221, 350422, 350423, G03B 1314

Patent

active

048871095

ABSTRACT:
A camera having a viewfinder and a taking lens changeable in focal length between at least two different focal lengths: a relatively short focal length suitable for wide-angle photography and a relatively long focal length suitable for telephotography and that allows close-up photography when the taking lens is changed to have the long focal length. The viewfinder has at least one movable lens which is axially moved and shifted away from the optical axis of the finder with respect to the axis of the taking lens when the taking lens is changed in focal length, to deflect the optical axis of the finder in order to cancel parallax error, depending on object distance.

REFERENCES:
patent: 2062585 (1936-12-01), Laube et al.
patent: 2995061 (1961-08-01), Briskin et al.
patent: 4038673 (1977-07-01), Schroder et al.
patent: 4119983 (1978-10-01), Tanaka
patent: 4129369 (1978-12-01), Kobayashi et al.
patent: 4715692 (1987-12-01), Yamada et al.

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