Abstract: A drive device includes a magnetic circuit unit including a first yoke, a second yoke, and a first magnet, a magnetic circuit unit including the first yoke, the second yoke, a second magnet, a first coil that is bonded to a focus lens, in which the magnetic circuit units drive the first coil and the focus lens by an electromagnetic force generated in the first coil, the first magnet corresponds to a first movement amount of movement of the focus lens, and the second magnet corresponds to a second movement amount of movement of the focus lens.

Abstract: A drive device includes a piezoelectric element, a drive shaft that receives vibration of the piezoelectric element and vibrates along an optical axis direction of a first imaging optical system, an engagement member that is frictionally engaged with the drive shaft and is connected to the first imaging optical system, and a lens controller that controls vibration of the piezoelectric element, in which the first imaging optical system is provided to be movable in a range including at least a first position and a second position, and the lens controller performs control of moving the first imaging optical system from the first position to the second position in a case in which a signal for instructing a power of the drive device to be turned off is received.

Abstract: A lens apparatus includes: an optical system which includes a movable lens group, the optical system including a first correction lens group which adjusts an optical performance of the optical system and a second correction lens group which adjusts a center position of an image which is formed by the optical system; and a control unit which controls driving of the first correction lens group so as to correct the change of the optical performance due to movement of the movable lens group based on position information of the movable lens group and controls driving of the second correction lens group so as to correct displacement of the center of an image due to the movement of the movable lens group and the first correction lens group based on position information of the first correction lens group.

Abstract: An appropriate operation angle (actuation angle) corresponding to a use is obtained by a relatively simple structure. A focus ring 20 is mounted around a focus cam 10. When the focus ring 20 is moved to a front end side, a gear formed in the focus ring 20 meshes with a gear 17 of the focus cam 10 and the rotation of the focus ring 20 is directly transmitted to the focus cam 10. When the focus ring 20 is moved to a rear end side, the gear formed in the focus ring 20 meshes with pinions 15 mounted on the focus cam 10 and the rotation of the focus ring 20 is directly transmitted to the focus cam 10 through the pinions 15. A half of the rotation angle of the focus ring 20 is the same as the rotation angle of the focus cam 10.

Abstract: An appropriate operation angle (actuation angle) corresponding to a use is obtained by a relatively simple structure. A focus ring 20 is mounted around a focus cam 10. When the focus ring 20 is moved to a front end side, a gear formed in the focus ring 20 meshes with a gear 17 of the focus cam 10 and the rotation of the focus ring 20 is directly transmitted to the focus cam 10. When the focus ring 20 is moved to a rear end side, the gear formed in the focus ring 20 meshes with pinions 15 mounted on the focus cam 10 and the rotation of the focus ring 20 is directly transmitted to the focus cam 10 through the pinions 15. A half of the rotation angle of the focus ring 20 is the same as the rotation angle of the focus cam 10.

Abstract: A lens apparatus includes: an optical system which includes a movable lens group, the optical system including a first correction lens group which adjusts an optical performance of the optical system and a second correction lens group which adjusts a center position of an image which is formed by the optical system; and a control unit which controls driving of the first correction lens group so as to correct the change of the optical performance due to movement of the movable lens group based on position information of the movable lens group and controls driving of the second correction lens group so as to correct displacement of the center of an image due to the movement of the movable lens group and the first correction lens group based on position information of the first correction lens group.