Lens barrel

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;
• a barrel body in which the first optical element and the second optical element are housed;
• a support member detachably mounted at the barrel body, which supports the first drive shaft, the second drive shaft, the first drive unit and the second drive unit;
• 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.

An imaging apparatus, 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;
• an image-capturing element that captures a subject image via the first optical element and the second optical element;
• 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.