Lens barrel

A lens barrel including an image optical system having an optical axis, the lens barrel comprising:

• a first lens configured to collect light from an object;
• a second lens disposed in the axial direction of the first lens and configured to move along the optical axis;
• a guide shaft disposed in the radial direction relative to the optical axis, the guide shaft being configured to guide the second lens along the optical axis;
• a driving unit configured to move the second lens along the guide shaft;
• an adjusting mechanism disposed in the radial direction relative to the optical axis, the adjusting mechanism being coupled to the guide shaft and including a first portion and a second portion, the first portion being elastically deflectable and supports one end of the guide shaft, the second portion being configured to press against the first portion to deflect the first portion at an angle relative to the optical axis, the adjusting mechanism being configured to adjust the position of the guide shaft if the second portion presses against the first portion;
• and
• a base frame that supports the other end of the guide shaft,
• the guide shaft being arranged to at least partially overlap the driving unit in the circumferential direction around the optical axis,
• the first lens being arranged to at least partially overlap the adjusting mechanism in the radial direction relative to the optical axis, and
• the second portion having a pressure axis coinciding with the direction of pressure being applied by the second portion to the first portion, the pressure axis being positioned away from the driving unit.