Optical apparatus

Abstract

An optical apparatus is disclosed which can prevent displacement of subject images due to an initializing operation of the image stabilizing unit from being seen by a photographer through a finder. The apparatus comprises an image-stabilizing unit which includes a movable unit movable for image stabilization and balls movable in conjunction with the movement of the movable unit, and a controller which controls operations of the movable unit. The controller causes the movable unit to perform a specific operation for moving the balls to a specific position in response to mounting of the optical apparatus on another optical apparatus, the specific operation being a different operation from an image stabilization operation of the image-stabilizing unit.

1 . An optical apparatus comprising: 
 an image-stabilizing unit which includes a movable unit movable for image stabilization and balls movable in conjunction with the movement of the movable unit; and    a controller which controls operations of the movable unit,    wherein the controller causes the movable unit to perform a specific operation for moving the balls to a specific position in response to mounting of the optical apparatus on another optical apparatus, the specific operation being a different operation from an image stabilization operation of the image-stabilizing unit.    
   
   
       2 . The optical apparatus according to  claim 1 , wherein the controller causes the movable unit to perform the specific operation in response to an initial communication performed after the mounting between the optical apparatus and the other optical apparatus.  
   
   
       3 . An optical apparatus comprising: 
 an image-stabilizing unit which includes a movable unit movable for image stabilization and balls movable in conjunction with the movement of the movable unit; and    a controller which controls operations of the movable unit,    wherein the controller causes the movable unit to perform a specific operation for moving the balls to a specific position in a state where a power switch of the optical apparatus or another optical apparatus on which the optical apparatus is mounted is off, the specific operation being a different operation from an image stabilization operation of the image-stabilizing unit.    
   
   
       4 . The optical apparatus according to  claim 3 , wherein the controller causes the movable unit to perform the specific operation in response to elapse of a certain time period after the power switch is turned off from on.  
   
   
       5 . The optical apparatus according to  claim 3 , wherein: 
 the power switch is provided on the other optical apparatus;    the other optical apparatus transmits a signal to the optical apparatus in the state where the power switch is off; and    the controller causes the movable unit to perform the specific operation in response to reception of the signal.    
   
   
       6 . The optical apparatus according to  claim 3 , wherein the controller performs the specific operation by using electric power supplied from a backup battery mounted on the other optical apparatus.  
   
   
       7 . An optical apparatus comprising: 
 an image-stabilizing unit which includes a movable unit movable for image stabilization and balls movable in conjunction with the movement of the movable unit; and    a controller which controls operations of the movable unit,    wherein the controller causes the movable unit to perform a specific operation for moving the balls to a specific position in response to replacement of a power supply on the optical apparatus or another optical apparatus on which the optical apparatus is mounted, the specific operation being a different operation from an image stabilization operation of the image-stabilizing unit.    
   
   
       8 . The optical apparatus according to  claim 7 , wherein: 
 the power supply is mounted on the other optical apparatus;    the other optical apparatus transmits a signal to the optical apparatus in response to the replacement of the power supply; and    the controller causes the movable unit to perform the specific operation in response to reception of the signal.    
   
   
       9 . An image-pickup system comprising: 
 the optical apparatus according to  claim 1;  and    an image-pickup apparatus on which the optical apparatus is mounted and which includes a finder for observing a subject image formed by the optical apparatus.    
   
   
       10 . An image-pickup system comprising: 
 the optical apparatus according to  claim 3;  and    an image-pickup apparatus on which the optical apparatus is mounted and which includes a finder for observing a subject image formed by the optical apparatus.    
   
   
       11 . An image-pickup system comprising: 
 the optical apparatus according to  claim 7;  and    an image-pickup apparatus on which the optical apparatus is mounted and which includes a finder for observing a subject image formed by the optical apparatus.