| 摘要 |
PURPOSE:To observe a fine finder image even when a strong semiconductor laser light source is used by arranging an optical member for interrupting the incidence of infrared light flux on a part of a finder system. CONSTITUTION:The optical member 9 such as an optical filter for interrupting the incidence of infrared light flux upon an observing position 8 for a finder image is arranged on a part fo othe finder system 7. A part of the infrared light flux radiated from a light source 6 is reflected by the 1st optical divider 2 or the len surface of the pregroup 1 and returned to the finder system as infrared flare or infrared goast, so taht the finder image is colored with red and the picture quality may be reduced. However, these deterioration can be prevented by arranging the optical member 9. Thereby, a fine finder image can be obtained in an optical system having a TTL type active focus detector by using a semiconductor laser with a strong output. |
