Title:
Optical apparatus
Document Type and Number:
Japanese Patent JP6168831
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To perform high-speed imaging even in a case where an f-number is set to the side of an open aperture rather than a minimal aperture diameter enabling phase difference focus detection.SOLUTION: A camera body 1 includes a camera CPU 101 that when a target f-number is set to the side of an open aperture rather than an AF limit f-number corresponding to a minimal aperture diameter allowing focus detection means 4, which performs focus detection according to a phase difference method using an inner measure, to perform focus detection, after exposure at a target diaphragm position is completed, does not move a diaphragm to the position of an open aperture f-number but allows the focus detection means to perform focus detection of an imaging optical system at the position of the target f-number for the purpose of subsequent exposure.
Inventors:
Masatetsu Ishikawa
Application Number:
JP2013091186A
Publication Date:
July 26, 2017
Filing Date:
April 24, 2013
Export Citation:
Assignee:
Canon Inc
International Classes:
G02B7/28; G02B7/34; G03B13/36; G03B19/02; H04N5/232; H04N5/238
Domestic Patent References:
| JP4159528A | ||||
| JP6169428A | ||||
| JP6186473A | ||||
| JP2010262173A | ||||
| JP2000162494A | ||||
| JP2011164226A | ||||
| JP2011022386A |
Attorney, Agent or Firm:
Ryosuke Fujimoto
Atsushi Mizumoto
Hirayama Tomoya
Atsushi Mizumoto
Hirayama Tomoya