US 12,348,869 B2
Lens apparatus and image pickup apparatus
Hideki Sakai, Sakura (JP)
Assigned to CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed by CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed on Dec. 19, 2022, as Appl. No. 18/067,936.
Application 18/067,936 is a continuation of application No. 16/906,258, filed on Jun. 19, 2020, granted, now 11,563,896.
Claims priority of application No. 2019-124649 (JP), filed on Jul. 3, 2019.
Prior Publication US 2023/0120733 A1, Apr. 20, 2023
Int. Cl. G02B 15/163 (2006.01); G03B 3/10 (2021.01); H04N 23/69 (2023.01)
CPC H04N 23/69 (2023.01) [G02B 15/163 (2013.01); G03B 3/10 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A lens apparatus comprising:
an operation member that is rotatable by a user operation;
a zoom lens configured to perform zooming in accordance with a rotation of the operating member; and
a detector configured to divide an entire zoom range from a wide-angle end to a telephoto end, and detect a zoom position of the zoom lens; and
a memory storing distortion correction information corresponding to each zoom position of the zoom lens,
wherein, in a zoom range that satisfies the following condition:
Dist<−8.0,
where Dist (%) is a distortion amount of the zoom lens,
the lens apparatus includes a zoom range in which a zoom position detecting resolution per unit rotational angle is the highest,
wherein, in a zoom range that satisfies the following condition:
Dist>0.0,
the lens apparatus includes a zoom range in which the zoom position detecting resolution per unit rotational angle is the lowest, and
wherein the lens apparatus transmits zoom position information indicating a current zoom position and distortion correction information stored in the memory corresponding to the current zoom position to a camera.