| 摘要 |
<p>PURPOSE:To facilitate incorporation to the camera by using a photo detector and an optical auxiliary means. CONSTITUTION:A photo detector 12 is disposed at the center or the like of the incident face 11a of pentagonal prism 11, and a photometric lens 14 is formed as an optical auxiliary means on the central spherical face part 13'a of a focusing glass 13' composed of Fresnel lens to let the light imaged on the focus plane A be reimaged on the photo detector 12 by the photometric lens 14. Since this enables the photo detector 12 to be disposed in the position away from the focus plane A and enables the image on the focus plane A to be reimaged and focused by the use of the focusing glass 13' itself, the incorporation is made possible without impairing the function of the finder and with virtually no change in the constitution of the single-lens reflex camera.</p> |
