| 摘要 |
PURPOSE:To always allow an object image to coincide with the visual field of a focusing display even if object distance is changed by changing the position of an emitting element which lights a hologram plate according to the object distance. CONSTITUTION:The hologram plate 5 set in a non-TTL type finder system diffracts light from an emitting element 4 arranged outside a finder optical path and performs focusing display in a finder visual field. When the object distance is changed, the light emitting element 4 is moved in the way that the diopter of the focusing display coincides with an object diopter, for example, by a motor, a bimorph, etc., in response to object distance found by a range- finding device 1. Therefore, even if the object distance is changed a photographer can constantly see a focusing display at the same position as an object image position and obtain the finder easy to see. |
