Camera with changeable focal length

Details Camera with changeable focal length Camera with changeable focal length

1987-12-15

1988-12-20

Perkey, W. B.

35419512, G03B 310, G03B 500

Patent

active

047928220

ABSTRACT:
An automatic focusing camera which is equipped with a taking lens system 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. When the taking lens system is changed to have the relatively short focal length, the taking lens is further changed to be able to take close-up photographs and the automatic focusing is simultaneously changed to cover a short subject distance range between, for example 0.1 and 1.0 m.

REFERENCES:
patent: 4367934 (1983-01-01), Matsui
patent: 4536068 (1985-08-01), Kodaira
patent: 4582411 (1986-04-01), Ohmura et al.
patent: 4627699 (1986-12-01), Takagi
patent: 4643555 (1987-02-01), Wakabayashi
patent: 4660954 (1987-04-01), Fujita et al.
patent: 4688919 (1987-08-01), Ogawa et al.
patent: 4696559 (1987-09-01), Kondo

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