Patent ID: 6944396
Filing Date: 2005-09-13
Classification: G02B,G03B

Abstract:
1. A lens barrel which accommodates a shooting lens having a plurality of lens groups including at least a variable-power lens group and a focus-adjusting lens group, which can change a barrel length between an accommodated state having a relatively short barrel length and a shooting state having a relatively long barrel length, the lens barrel comprising: a lens retracting mechanism which retracts at least one of the lens groups from a shooting optical axis when the lens barrel is retracted to be in the accommodated state, and a lens advancing mechanism which advances the lens group retracted when the lens barrel is retracted to the shooting optical axis when the lens barrel advances to be in the shooting state, wherein the shooting lens forms a shooting optical system by the remaining lens group among the plurality of lens groups excluding the lens group retracted from the shooting optical axis when the lens barrel is in the accommodated state.