Camera and switch

A camera, comprising:

• at least one lens configured to form an image of a subject in a photographing area of a photographic film;
• at least one aperture blade in front of the at least one lens, the at least one aperture blade being movable between a minimum aperture position at which the at least one aperture blade generates vignetting at a periphery of the photographing area and a maximum aperture position radially outward from the minimum aperture position;
• and
• a switch including an operation lever movable through a user operation and an actuation lever connected to the at least one aperture blade, the actuation lever being operable to move the at least one aperture blade between the minimum aperture position and the maximum aperture position in response to movement of the operation lever, wherein the switch further includes
• a base,
• a cam assembly configured to convert the movement of the operation lever to rotation of the actuation lever, the cam assembly including
• a cam slot in one of the operation lever or the actuation lever, and
• a follower on the other of the operation lever or the actuation lever, the follower being engageable with the cam slot and movable along the cam slot, and
• a pusher configured to apply a force to the follower in the cam assembly,
• the operation lever in the switch is movable on the base in a circumferential direction about a first axis,
• the actuation lever in the switch is rotatable about a second axis,
• the at least one aperture blade is rotatable about a rotation axis,
• the cam slot in the cam assembly includes an inner portion and an outer portion located radially outward from the inner portion with respect to the first axis, and the cam slot is elongated in the circumferential direction between the inner portion and the outer portion,
• the follower in the cam assembly is movable between a first follower position in the inner portion of the cam slot and a second follower position in the outer portion of the cam slot, and
• the pusher pushes the follower in the cam assembly toward the first follower position in response to the follower being closer to the first follower position than to a reference follower position, and pushes the follower in the cam assembly toward the second follower position in response to the follower being closer to the second follower position than to the reference follower position.