| 摘要 |
PROBLEM TO BE SOLVED: To prevent the change of a viewing way between the field of a finder optical system and a field frame and a field correction frame by moving the field correction frame in a direction perpendicular to the optical axis of the finder optical system and also moving it in an optical axis direction by a field varying means. SOLUTION: The field frame 9 is formed in a curved surface shape along the curved surface of an image-formation surface 5, and any part is viewed to be constant with respect to the finder field by the frame 9. The field correction frame 8 is provided to be superposed on the frame 9, and formed in the curved surface shape along the curved surface of the surface 5 similarly to the frame 9 and integrally supported by an arm part 8a. The driving force of a motor is transmitted to the gear part 8c of the frame 8 through a driving transmitting mechanism so as to move the frame 8 around a rotary shaft 8b. By such constitution, the frame 8 is moved in the direction perpendicular to the optical axis O and also moved in the direction of the optical axis O.
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