| 摘要 |
PURPOSE:To always observe a satisfactory finder image by arranging a focal point detection display part on a plane optically equivalent to a first-order image forming plane out of a focal point detection optical path. CONSTITUTION:A first field lens 4 is arranged near a first-order image forming plane 1a, condensed light flux based on a subject on the first-order image forming plane 1a and efficiently guides the light to following optical elements. A second field lens 7 is arranged so that a rear plane 7b can be almost coincident to a second-order image forming plane 1aa. Further, the first-order image forming plane 1a and the second-order image forming plane 1aa are optically conjugated through an elector 6 and the second field lens 7. On the rear plane 7b of the second field lens 7, for example, a focal point detection display part (AF mark) is provided to express a distance range measured by a focal point detecting means 10. Namely, the AF mark showing the measured visual distance range is provided on the second-order image forming plane 1aa optically conjugated with the first-order image forming plane 1a, interference with a focal point detecting system is prevented, and high-accuracy focal point detection is enabled. |
