| 摘要 |
PURPOSE:To constantly and precisely meter a stroboscope by using a semi- transmitting and fixing mirror and disposing a sensor for detecting the emitting light quantity of the stroboscope in a finder optical system. CONSTITUTION:When an object is bright, incident object light is transmitted to a film side via the semi-transmitting and fixing mirror 2, totally reflected on a following mirror 3, and led to a range-finding device 4. The slippage quantity of a focus is calculated. A lens driving direction and a lens driving signal are transmitted to a lens driving device 16, and the lens is driven by means of the output of the device 16, and the focus is sharpened. Then, the light quantity of reflected light divided by the mirror 2 is metered by a metering sensor 10, and a diaphragm 15 is stopped down by means of a metering output. When stopping down is finished, the first blade 18 and the second blade 19 of a shutter is opened and closed, and a film 5 is exposed. When the object is dark, when the first blade 18 of the shutter is finished to be opened, the stroboscope ST starts emitting. When light due to said emission reaches to prescribed value, the emission stopping signal of an emission stopping signal generating circuit 11 is generated and stroboscopic emission is stopped, and the second blade 19 is closed. |
