The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 23, 2023
Filed:
Nov. 23, 2020
Canon Kabushiki Kaisha, Tokyo, JP;
Hideya Takanashi, Kanagawa, JP;
CANON KABUSHIKI KAISHA, Tokyo, JP;
Abstract
An image pickup apparatus to which an image pickup accessory having a focus lens and a diaphragm is detachably attachable includes a communication unit configured to communicate with the image pickup accessory, an image pickup unit, an exposure control unit, and a focus control unit. The communication unit transmits a request for diaphragm control to the image pickup accessory, and receives first information on a relationship between a diaphragm position and a variation in a light amount during the diaphragm control, second information corresponding to the diaphragm position, and third information corresponding to the diaphragm position and light transmittance of the image pickup accessory. The exposure control unit controls the exposure based on the first information and the second information. The focus control unit controls the driving of the focus lens based on the defocus amount calculated based on the third information.