DIAPHRAGM VALUE RECOGNITION

摘要

Disclosed is a method for determining the actual aperture of the diaphragm (operational diaphragm) of lenses on digital cameras featuring a viewfinder and internal exposure measurement through the lens. Said method is characterized in that the exposure is also externally measured past the lens (1), and the value of the operational diaphragm is determined from the difference ?BV between the two measured exposure values BV(int) and BV(ext). A digital camera that is suitable for carrying out the disclosed method is characterized in that the housing of the digital camera is provided with an additional window for another exposure meter (7, 9) encompassing a lens system (8) that is mounted in front thereof, said additional window being located outside the area covered by the lens tube.