MOUNT STRUCTURE FOR PHOTOGRAPHING LENS

PROBLEM TO BE SOLVED: To prevent a mount ring from being loosened by providing the circumferential surface thereof with a stopper member which can be elevated and lowered in the radial direction and engaging the stopper member with a groove firmed at the side surface of a photographing lens barrel after fixing a photographing lens by the action of the screw of the mount ring. SOLUTION: The bayonet ring 74 of the photographing lens barrel 70 is adjusted to the notched part of the mount ring 16 and inserted in it. By turning the ring 16 in the rotating direction of the right handed screw, the ring 74 is fixed by being interposed between the inner surface of the ring 16 and the end surface of a lens barrel receiving seat 14. Thereafter, a rotary lever 60 arranged on the ring 16 is screwed and lowered toward inside in the nadial direction of the ring 16. Then, the tip part of the lever 60 is engaged with a stopper groove 76 and the lens barrel 70 is tightened from the outside in the radial direction by the lever 60. Thus, the ring 16 is prevented from being rotated in a circumferential direction.