An aperture-priority lens shutter apparatus

摘要

An aperture-priority lens shutter apparatus for a camera has a compact construction and an automatic exposure control function. The aperture-priority electromagnetic lens shutter apparatus for a camera comprises a lens mount 2; two lens shutter blades 64, 66 serving as a lens shutter and a diaphragm at the same time; a driving mechanism for driving the lens shutter blades; a button switch (Figure 11, not shown) for setting an F number manually; a light measuring circuit for emitting a signal corresponding to the amount of light available to photograph an object; and a central processing unit including an exposure control time table in which the exposure control data are inputted, an operator for operating an exposure time in case of a semiautomatic mode and a driver for driving the driving mechanism.