Diaphragm correcting means of an objective lens mounted on a sin

Details Diaphragm correcting means of an objective lens mounted on a sin Diaphragm correcting means of an objective lens mounted on a sin

1979-07-09

1981-05-12

Hix, L. T.

G03B 720

Patent

active

042668654

ABSTRACT:
In an objective lens removably mountable with respect to a camera housing and having a diaphragm member forming an aperture and diaphragm driving means displaceable to stop down the diaphragm member in a range over which the area of the aperture is from maximum to minimum, the housing having a metering circuit for measuring the light transmitted through the lens when the aperture is maximum, diaphragm correcting means are provided on at least one of the diaphragm driving means and the diaphragm member to impart a correction of the stop down step number corresponding to the difference between a theoretical metering output calculated from the open F-value of the lens and the brightness of an object and the actual metering output of the metering circuit, to the relation between the variation in area of the aperture and the displacement of the diaphragm driving means.

REFERENCES:
patent: 3427946 (1969-02-01), Broschke et al.
patent: 3683765 (1972-08-01), Iura

Affiliated with

Also associated with

Rating

Diaphragm correcting means of an objective lens mounted on a sin does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Diaphragm correcting means of an objective lens mounted on a sin, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Diaphragm correcting means of an objective lens mounted on a sin will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2043807