Finder optical system and camera having the system
AssigneeCanon Kabushiki Kaisha
InventorHIROSHI SAITO
Life of this patent
Estimating the term…
Abstract
A finder optical system for observing an object therethrough, includes a variable-power objective optical system, an eyepiece optical system for guiding light from the object via the objective optical system to an observer, and an adjustor for changing the optical characteristics of an image of the object observed by the observer through the eyepiece optical system based on information about the temperature of the finder optical system, the distance from the finder optical system to the object, and the zoom position of the objective optical system.
Claims38
A finder optical system for observing an object therethrough, comprising:
- a variable-power objective optical system;
- an eyepiece optical system for guiding light from the object via said objective optical system to an observer;
- and
- adjustment means for changing the optical characteristics of an image of the object observed by the observer through said eyepiece optical system based on information about the temperature of the finder optical system, the distance from the finder optical system to the object, and the zoom position of said objective optical system.
A finder optical system for observing an object, comprising:
- an objective optical system;
- an eyepiece optical system for guiding light from the object via said objective optical system to an observer;
- and
- adjustment means for changing the imaging position of said objective optical system based on temperature information.
A camera comprising:
- a photographing optical system for forming an image of an object on a photosensitive plane;
- and
- a finder optical system for observing said object therethrough,
- wherein said finder optical system comprises:
- a variable-power objective optical system;
- an eyepiece optical system for guiding light from the object via said objective optical system to an observer;
- and
- adjustment means for changing the optical characteristics of an image of the object observed by the observer through said eyepiece optical system based on information about the temperature of the finder optical system, the distance from the finder optical system to the object, and the zoom position of said objective optical system.
A camera comprising:
- a photographing optical system for forming an image of an object on a photosensitive plane;
- and
- a finder optical system for observing said object therethrough, wherein said finder optical system comprises:
- an objective optical system;
- an eyepiece optical system for guiding light from the object via said objective optical system to an observer;
- and
- adjustment means for changing the imaging position of said objective optical system based on temperature information.
Dependencies are inferred from the claim text.