| 摘要 |
PURPOSE:To obtain display with superior visibility in a finder by providing a movable image control means which receives a signal regarding photography and give visible variation to the luminous flux of the movable image optical means. CONSTITUTION:A fixed image optical system consists of an objective 1, prisms 2 and 3, and an ocular 4, and the movable image optical system consists of a prism 5, movable lens 6, frame plate 7, lens 8, prism 3, and ocular 4. A light shielding plate 10 as the movable image control means is provided in front of the incidence surface 5a of the prism 5, and the movable lens 6 oscillates around a point X as a center according to the focus adjustment of a photographic lens. Subject light incident to the objective 1 forms a fixed image through the prisms 2 and 3 and ocular 4, and subject light incident to the incidence surface 5a of the prism 5 forms a movable image through the movable lens 6, frame plate, lens 8, prism 3, and ocular 4. |
