Patent ID: 7502552

Claim:
An imaging device comprising: a radially-retracting device comprising a retractable moving frame for moving at least one radially-retractable optical element, serving as part of a photographing optical system, along a driving direction between a photographing position on a common optical axis of said photographing optical system and a radially-retracted position away from said common optical axis; a biasing device for biasing said retractable moving frame in a direction toward said photographing position; a positioning device which determines a limit of movement of said retractable moving frame in said biasing direction of said biasing device; and a sub-positioning device comprising a sub-moving frame on which said at least one radially-retractable optical element is supported, wherein said sub-moving frame is guidable by said retractable moving frame such that said sub-moving frame is movable in a direction intersecting said driving direction of said radially-retracting device, and wherein said sub-positioning device is configured to restrict movement of said sub-moving frame in the direction intersecting the driving direction of said radially-retracting device.