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:
Feb. 16, 2016
Filed:
Jul. 28, 2014
Canon Kabushiki Kaisha, Tokyo, JP;
Masato Shiono, Hadano, JP;
CANON KABUSHIKI KAISHA, Tokyo, JP;
Abstract
An optical apparatus which is capable of, when performing manual focus shooting, freely adjusting a rack focus speed and stabilizing a final focusing accuracy for a shooting subject. Operation of the focus lens, which is driven in a direction of an optical axis by a motor, is controlled in accordance with rotation of a manual focus ring. A position of the focus lens in the direction of the optical axis, which is detected when the focus lens lies at a predetermined position, is stored in a storage unit. According to the relationship between a signal indicative of a current position of a focus lens and a signal indicative of a position of the focus lens, which is stored in the storage unit, the amount by which the focus lens is driven relative to rotation of a manual focus ring is changed.