Patent ID: 7746564

Claim:
A lens barrel comprising: a first optical element that is allowed to move along an optical axis; a first driven member connected to the first optical element; a second optical element disposed in the optical axis of the first optical element, which is allowed to move along the optical axis; a second driven member connected to the second optical element; a first drive shaft disposed substantially parallel to the optical axis to drive the first driven member along the optical axis; a second drive shaft disposed substantially parallel to the optical axis to drive the second driven member along the optical axis; a first drive unit connected to an end of the first drive shaft to drive the first drive shaft; a second drive unit connected to an end of the second drive shaft to drive the second drive shaft and disposed at a position that partially overlaps a position of the first drive unit when viewed from the direction of the optical axis; a light quantity adjustment unit disposed toward an image side along the optical axis relative to the first and second optical elements to reduce a quantity of light; and a light quantity adjustment drive unit disposed on a side opposite from the second drive unit with the optical axis present in between, to drive the light quantity adjustment unit.