Patent ID: 9635239
Date: 2017-04-25
CPC Classifications: G02B,G03B,H04N

Claim:
1. A lens barrel comprising: an optical system that includes a focus adjustment lens; a drive unit that drives the focus adjustment lens in an optical axis direction; a zoom lens drive unit that drives a zoom lens in the optical axis direction; a transceiver unit that performs transmission and reception of a signal between the lens barrel and a camera body; and a control unit that controls the transceiver unit so that the transceiver unit transmits to the camera body a first image plane movement coefficient determined depending on a lens position of the focus adjustment lens, wherein the control unit, when receiving a first signal from the camera body via the transceiver unit, transmits to the camera body via the transceiver unit a second image plane movement coefficient that does not depend on the lens position of the focus adjustment lens, wherein when a focal distance of the zoom lens does not vary, the second image plane movement coefficient does not vary even if the lens position of the focus adjustment lens varies, but when a focal distance of the zoom lens varies, the second image plane movement coefficient varies.