Patent ID: 9715080
Date: 2017-07-25
CPC Classifications: G02B,G03B

Claim:
1. A lens device comprising: a first movable lens held by a movable lens frame that is capable of being positioned on an optical axis of a lens barrel and retreated from the optical axis by rotating about a rotating shaft by a predetermined angle, wherein in a case in which an inner space of the lens barrel is divided into four spaces by a first plane passing through the rotating shaft and the optical axis and a second plane passing through the optical axis and perpendicular to the first plane and the four spaces are defined as a first space, a second space, a third space, and a fourth space counterclockwise when seen toward a subject side from an image side, the rotating shaft is present between the third space and the fourth space, in a case in which the first movable lens is positioned on the optical axis, a part to be detected is formed at a portion, which is present in the first space, of the movable lens frame, and a detecting part, which outputs a signal representing that the first movable lens is positioned on the optical axis when detecting the part to be detected, is disposed in the first space wherein a removable drive unit to which the signal output from the detecting part is input is mounted on the outer peripheral surface of the first and fourth spaces.