| 摘要 |
PURPOSE:To simplify the structure of a dioptric power adjustment relation mechanism and reduce its size by moving back a transparent plate with a pattern for a dioptric power adjustment which is installed at the finder image forming position of a finder optical system in an optical-axis direction after the adjustment. CONSTITUTION:When the dioptric power of the finder optical system 9 of an endoscope camera 1 is adjusted, the transparent plate 15 is set at the finder image forming position P and then an ocular cylinder 13 is moved in the optical axis direction while the pattern for dioptric power adjustment on the transparent plate 15 is viewed to select a suitable dioptric power position. An operation button 17 is operated outside of a camera body 4 after this dioptric power adjustment and aholding frame 16 is moved in the optical axis direction shown by an arrow in a figure to move back said transparent plate 15 in its optical axis direction. Then, the pattern for dioptric power adjustment provided to the transparent plate 15 deviates from the finder image forming position P, so it disappears from a visual field of observation. Namely, the pattern for dioptric power adjustement is not in the visual field of a finder during photography, so no hindrance to abservation is caused. |
