A lens barrel includes a lens, a rotatable operation member, a rotation amount detector configured to detect a rotation amount of the operation member, an operation detector configured to detect a rotational operation of the operation member, the operation detector having a mechanism that is different from a mechanism of the rotation amount detector, and a controller configured to perform drive control of the lens depending on rotation of the operation member, and the controller is capable of operating the lens barrel in a first mode in which the rotation amount detector is used and a second mode in which the operation detector is used, and power consumption required in the second mode is less than power consumption required in the first mode.