Variable speed control for zooming

Details Variable speed control for zooming Variable speed control for zooming

1975-04-03

1977-01-11

Corbin, John K.

350255, 354195, G02B 1500, G03B 300

Patent

active

040024059

ABSTRACT:
A variable speed drive for controlling the movement of the zoom component of a zoom lens system such that the speed of zooming will be proportional to the amount of manual displacement of a control member. The same manually operable control member which controls the speed, the amount and the direction of zooming also controls the position of the focusing component so that focusing as well as selectively varying the speed and amount of zooming can all be effected by a single control member.

REFERENCES:
patent: 3347985 (1967-10-01), Barr et al.
patent: 3765748 (1973-10-01), Mito

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