Lens control device

Details Lens control device Lens control device

1998-12-10

2000-05-30

Perkey, W. B.

Photography

Exposure control system responsive to focal length

Control of full open aperture value

396 86, 396257, G03B 700, G03B 1700

Patent

active

060700165

ABSTRACT:
A lens control device which uses a zoom lens in which the state of marginal light quantity varies according to each focal length is arranged to compensate for a variation in marginal light quantity during zooming by detecting the focal length and controlling a maximum aperture diameter of an iris.

REFERENCES:
patent: 4141636 (1979-02-01), Shimojima
patent: 5146259 (1992-09-01), Kobayashi et al.
patent: 5278605 (1994-01-01), Satoh

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