| 摘要 |
An automatic flash selection device for use with fully automatic exposure setting cameras comprising an exposure meter pointer, stopper plate and a coacting detector plate which are displaced in response to the actuation of the shutter release, a distance proportional to the angle of rotation of the pointer in that the plates are blocked during their displacement by the pointer when its angle of rotation is less than a predetermined angle, but are displaced to the full length of their strokes when the angle is beyond a predetermined angle; a pivoted first lever coupling the detector plate and the shutter stop mechanism; a pivoted intermediate lever rotated by the first lever and coupled to the shutter speed selection lever; a focusing cam operated by the focusing mechanism and a pivoted third lever abutting the intermediate lever and the shutter stop mechanism. When there is adequate light on the subject, the first lever controls the shutter stop mechanism in response to the proportional displacement of the detector plate. However, when there is insufficient light, the detector and stopper plate will pass through their full displacement, rotating the first and intermediate levers through a greater range, such that the third lever is disconnected from engagement with the intermediate lever and switches control of the shutter stop mechanism from the first lever to the focusing cam, while the stopper plate actuates a warning light in the flash equipment and the shutter speed selection lever is moved to a position causing the shutter speed mechanism to be operated at a low shutter speed. Thus, when the flash is to be used, the shutter stop mechanism is under the control of the focusing mechanism and the shutter speed is appropriately lowered.
|
