| 摘要 |
A single lens reflex camera includes a mirror swingable to a retracted position prior to shutter release and manually swingable to its retracted position independent of shutter release and having a light attenuating light transmitting section. A photoresistor is located between the camera focal plane and the mirror light transmitting section and is retracted with the initiation of shutter release. Means are provided for compensating for the increased light incident on the photoresistor with the manual retraction of the mirror, such as by advancing a light attenuating filter into registry with the photoresistor with the mirror manual retraction or by providing in the leg of a bridge network having the photoresistor in a leg, a resistor network whose resistance is varied by a fixed increment with the manual retraction of the mirror. |
