| 摘要 |
<p>PURPOSE:To use both as an AF sensor and a sensor for a flash quantity control by integrating the light quantity of light flux due to flash light emission by the AGC output of an AF sensor. CONSTITUTION:While a main mirror 2 is at the descending position, namely, in the condition before the photographing, the light flux through the photographing lens is divided into a finder optical system and a strobo photometry system by the main mirror. The light flux to transmit the main mirror is bent in the slanting backward direction to a sub-mirror 7 and made incident on strobo photometry devices 8-16. The strobo photometry device is used together with a so-called phase difference detecting system focus detecting device, and functions as the focus detecting device except when the strobo photometry is executed. A main object is placed to the center of the screen, the strobo is pre-light-emitted by a small light quantity, the light flux reflected by the object is photographed through a sub-mirror 7, a field lens 10, a secondary image-forming lens 14, etc., at a CCD sensor 16 and the strobo light- emitting quantity after the flaming is determined.</p> |
