| 摘要 |
PURPOSE:To compensate parallax rapidly and accurately by arranging a visual field frame display body made of liquid crystal at the imaging point of a viewfinder optical system. CONSTITUTION:During photography, a subject image is formed on a field lens 16 by the operation of lens groups 13, 14 and 15 in a viewfinder optical system 2. The subject image is re-formed by an erector lens 17 as an erect image, which is seen through a visual field frame display body 18 and an eyepiece lens 19. While the viewfinder optical system 2 is observed, the focusing of a photographic optical system 1 is adjusted, and data on the adjusted focal length and focusing length are inputted through sliding resistance plates 9 and 11 to a control circuit 12 to color the liquid crystal 20 of the visual field frame display body 1 according to the signal of the circuit 12. for example, when subject distance is infinite without reference to the focal length of the photographic optical system 1, the liquid crystal 20' in the visual field frame is colored where dots are given, and the proper visual field frame is a left upper part encircled by a thick line P. |
