Camera with switchable focal length

Details Camera with switchable focal length Camera with switchable focal length

1985-09-05

1987-02-17

Perkey, William B.

35419512, G03B 310

Patent

active

046435557

ABSTRACT:
A camera is provided with a rotary member capable of continuous rotation in relation to the movement of a photographing lens in the axial direction. The photographing lens is axially moved in response to the switching of focal length from a wide angle range to a telescopic range, and is also axially moved for focusing in each focal length. There are further provided a position detector which is driven by the rotary member and generates a signal indicating the position of the photographing lens, and a distance measuring device driven by the rotary member.

REFERENCES:
patent: 3678835 (1972-07-01), Takishima
patent: 3925797 (1975-12-01), Ettischer
patent: 4063260 (1977-12-01), Toyoshima
patent: 4065778 (1977-12-01), Harvey
patent: 4214829 (1980-07-01), Ohashi
patent: 4482228 (1984-11-01), Fujita
patent: 4525050 (1985-06-01), Ohashi
patent: 4536068 (1985-08-01), Kodaira
patent: 4540264 (1985-09-01), Daitoku et al.

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