Patent ID: 6618561
Filing Date: 2003-09-09
Classification: C23C,G03B

Abstract:
A stop changing device for a camera having a photometry unit and a flash unit, said stop changing device changing a stop in accordance with subject brightness measured by said photometry unit, and said camera being provided with a switch member for selecting whether said flash unit is activated or not, said stop changing device comprising:a fixed stop aperture disposed at a photographic optical axis of said camera; a stop plate movably provided relative to the optical axis, said stop plate being formed with a first stop aperture, which is smaller than said fixed stop aperture, and a second stop aperture, which is smaller than said first stop aperture; and a stop-plate positioning means for moving said stop plate to select one of said stop apertures, said stop plate being positioned such that said second stop aperture is set to the optical axis regardless of an operation of said switch member when said subject brightness is a predetermined level or more, and said stop plate being positioned so as to select either of said fixed stop aperture and said first stop aperture in accordance with the operation of said switch member when said subject brightness is less than the predetermined level.