View finder for camera
AssigneeFuji Photo Film Co., Ltd.
InventorYasuhiro Nishitani
Life of this patent
Estimating the term…
Abstract
A camera view finder has a movable eyepiece lens barrel which is automatically shifted in the optical axis to a specific axial position in which the view finder protrudes from the camera body and provides dioptric power suitable for normal eyesight photographers when powering on the camera, to an additional axial position and to shifted back within the camera body when powering off camera.
Claims17
A view finder having a finder optical system including an objective lens group and an eyepiece lens group for a camera, comprising:
- an eyepiece lens barrel mounting an eyepiece lens group of a finder optical lens group therein, said eyepiece lens barrel being movably incorporated in a camera;
- drive means incorporated in said camera for shifting said eyepiece lens barrel back and forth along an optical axis of said finder optical system;
- and
- control means, having a data memory in which position data representative of a specific axial position of said eyepiece lens barrel is stored, for controlling said drive means to shift said eyepiece lens barrel to said specific axial position based on said specific axial position data when said camera is electrically powered on and to shift back said eyepiece lens barrel within said camera when said camera is electrically powered off.
A view finder for a camera having a zoom lens, the view finder comprising two lens groups movable along an optical axis of the view finder, a first said lens group being an objective lens group adapted to be moved in coordination with a zoom lens of the camera, and a second said lens group being an eyepiece lens group adapted to be moved independently of said first lens group to vary a dioptric power of the view finder in response to an operator's command.
A view finder for a camera comprising:
- an eyepiece lens group in a movable barrel;
- a driver for moving said barrel along an optical axis of the view finder;
- control means comprising,
- a memory for storing positions of said barrel,
- a driver controller for operating said driver to move said barrel to a first one of said positions when the camera is turned on and to retract said barrel to a second one of the positions when the camera is turned off,
- a position shift switch for operating said driver to selectively move said barrel, and
- a data entry button for storing in said memory a further one of said positions selected by operation of said position shift switch.
A view finder for a camera comprising:
- an eyepiece lens group in a movable barrel;
- a driver for moving said barrel along an optical axis of the view finder;
- control means comprising,
- a memory for storing positions of said barrel,
- a driver controller for operating said driver to move said barrel to a first one of said positions when the camera is turned on and to retract said barrel to a second one of the positions when the camera is turned off, and
- a data entry/retrieval means for selectively operating said driver to move said barrel to a further one of said positions to change a dioptric power of the view finder for operators having eyesight other than normal.
Dependencies are inferred from the claim text.