VISIBILITY CORRECTING DEVICE FOR BACK DRIVEN SYSTEM AF SINGLE LENS REFLEX CAMERA

摘要

PURPOSE:To facilitate the correction of a visibility with an external operation regardless of the position of a body core by moving an eyepiece without changing a relative position with respect to the focusing plane of a finder corrected in the visibility. CONSTITUTION:The eyepice of two concave an convex groups 18 fitted into a key groove 31a, the straight advancing key 33a of a movable eyepiece frame 33 whose movable eyepiece (convex lens) 34 is stuck to a guide projection and a guiding groove on both right and left sides of a fixed eyepiece frame 31 stuck to a fixed eyepiece (concave lens) 32 and a pressing plate 35 is screwed on the straight advancing key 33a in the recessed part of the side surface of a straight advancing key groove side. Thus, the optical axes of two eyepieces can come out and simultaneously the movable eyepiece 34 can be smoothly and straightly advanced in an optical axial direction. A correcting lens mounted outside is dispensed with and inconvenience that a positional change is made between the eyepiece and the correcting lens attached outside by the focusing drive of the body core and the visibility is changed in each focusing drive or in accordance with driving quantity is not caused.