Photographic diaphragm and camera

摘要: A diaphragm having a series of regular leaves or blades which are pivoted to close down from maximum aperture very small aperture, plus single special closing element can be swung position obscuring the remaining when closed minimum position. this kind is particularly useful in lens mirror reflex camera during exposure, set accordance with light falling on photoelectric converter placed behind and which, also, there provision for taking into account stray interference converter, so that exposure purposes responsive only scene photographed, independently light.