Camera

A camera, comprising:

• a housing having a front surface with an opening;
• a frame accommodated in the housing;
• a lens barrel accommodating at least one lens, the lens barrel including
• a stationary cylinder including a base fastened frame and a cylindrical wall having a through-cam groove, the through-cam groove extending a circumferential position of the through-cam groove changing in an axial direction,
• a drive cylinder configured to drive the lens barrel to extend and retract, the drive cylinder being rotatable relative to the stationary cylinder without moving in the axial direction,
• a rotary cylinder rotatable relative to the stationary cylinder and movable in the axial direction,
• a key cylinder movable in the axial direction together with the rotary cylinder without rotating relative to the stationary cylinder, and
• a linearly movable cylinder rotatable relative to the rotary cylinder together with the key cylinder;
• a connecting frame attached to a rear end of the key cylinder in the lens barrel;
• and
• a first light shield including a first bellows connecting the connecting frame and the frame in an expandable manner,
• wherein the rotary cylinder includes
• a first cylindrical portion located radially inward from the cylindrical wall of the stationary cylinder, and
• a first actuation portion protruding radially outward from the first cylindrical portion and engaged with the through-cam groove in the stationary cylinder,
• the drive cylinder includes a second cylindrical portion located radially outward from the cylindrical wall of the stationary cylinder, the second cylindrical portion has a first axial groove extending in the axial direction and engaged with the first actuation portion of the rotary cylinder protruding radially outward through the through-cam groove in the stationary cylinder,
• the first cylindrical portion of the rotary cylinder has, on an inner circumferential surface of the first cylindrical portion, a first cam groove extending with a circumferential position of the first cam groove changing in the axial direction,
• the key cylinder includes a third cylindrical portion located radially inward from the first cylindrical portion of the rotary cylinder, the third cylindrical portion has a second axial groove extending in the axial direction, and
• the linearly movable cylinder includes
• a fourth cylindrical portion located radially inward from the first cylindrical portion of the rotary cylinder, and
• a second actuation portion protruding radially outward from the fourth cylindrical portion and engaged with the first cam groove on the rotary cylinder through the third cylindrical portion of the key cylinder.