Exposure control device for camera of variable focal length type

Details Exposure control device for camera of variable focal length type Exposure control device for camera of variable focal length type

1986-11-18

1988-10-11

Gellner, Michael L.

354481, 3541951, G03B 300, G03B 7099

Patent

active

047775084

ABSTRACT:
There is disclosed an exposure control device for a camera having a photographic lens of variable focal length type which includes exposure control means for controlling an exposure on the basis of a light coming from an object to be photographed and passing through an optical path different from that of the photographic lens and correcting means for correcting said exposure control means to correct the exposure depending upon a change of an open F-number of the photographic lens caused by a variation of the focal length, by changing a resistance value of a variable resistor or a length of the optical path for measuring the light in response to the variation of the focal length of said photographic lens.

REFERENCES:
patent: 3522763 (1970-08-01), Dietz
patent: 4122466 (1978-10-01), Iwata
patent: 4159864 (1979-07-01), Yasukuni
patent: 4349258 (1982-09-01), Kitai et al.
patent: 4451129 (1984-05-01), Ikari et al.

Affiliated with

Also associated with

Rating

Exposure control device for camera of variable focal length type does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Exposure control device for camera of variable focal length type, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Exposure control device for camera of variable focal length type will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1961005