Control device for exposure-with-zooming photography
AssigneeCanon Kabushiki Kaisha
InventorsChikara Aoshima, Yasuhiko Shiomi
Life of this patent
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Abstract
In the camera having a zoom lens with an automatic operating mechanism therefor, a device for controlling co-ordination of the mechanism with a shutter, comprises an exposure-with-zooming actuator arranged upon first stroke to actuate the mechanism so that the zoom lens is set in one of the terminal ends of movement thereof, and upon second stroke to initiate a zooming operation of the zoom lens by the mechanism, and control means responsive to start of the zooming for initiating an exposure operation of the shutter to a photographic film.
Claims20
A control device for exposure-with-zooming photography, comprising:
- (a) a focal length variable photographic optical system;
- (b) drive means for varying the focal length of said photographic optical system;
- (c) exposure means for performing an exposure operation;
- and
- (d) operating means for rendering operative said drive means and said exposure means simultaneously.
A control device for exposure-with-variable magnification photogrpahy, comprising:
- (a) a focal length variable photographic optical system;
- (b) drive means for varying the focal length of said photographic optical system;
- (c) exposure means for performing an exposure operation;
- (d) operating means for rendering operative said drive means and said exposure means simultaneously;
- and
- (e) prohibition means for selectively prohibiting the operation of said operation means.
A control device for exposure-with-variable magnification photography, comprising:
- (a) drive means for varying a focal length of a photographic optical system;
- (b) exposure means for performing an exposure operation;
- (c) change-over means for changing over the drive means beween a first mode, in which said exposure means is made operative during the drive of the drive means, and a second mode, in which the drive of said drive means and the operation of said exposure means are performed independently from each other.
A control device for exposure-with-variable magnification photography, comprising:
- (a) drive means for varying a focal length of a photographic optical system;
- (b) exposure means for performing an exposure operation;
- (c) setting means for setting the drive means so as to cause the exposure means to operate during the drive of the drive means;
- and
- (d) release means for releasing the setting means.
Dependencies are inferred from the claim text.