IMAGE-PICKUP APPARATUS

PROBLEM TO BE SOLVED: To provide an image-pickup apparatus where an evaluation value is correctly acquired at the acquisition target position of a contrast evaluation value, and deterioration in precision and an increase in autofocus time caused by the skip of a focal position are suppressed. SOLUTI...

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Bibliographic Details
Main Author KAWARADA MASAHIRO
Format Patent
LanguageEnglish
Published 24.06.2010
Subjects
ACCESSORIES THEREFOR
APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USINGWAVES OTHER THAN OPTICAL WAVES
APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FORPROJECTING OR VIEWING THEM
CINEMATOGRAPHY
ELECTROGRAPHY
HOLOGRAPHY
OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
OPTICS
PHOTOGRAPHY
PHYSICS
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Summary:PROBLEM TO BE SOLVED: To provide an image-pickup apparatus where an evaluation value is correctly acquired at the acquisition target position of a contrast evaluation value, and deterioration in precision and an increase in autofocus time caused by the skip of a focal position are suppressed. SOLUTION: In the lens exchange type image-pickup apparatus having a focus detecting means detecting the focal position of an object by a contrast evaluation value, the apparatus comprises: acquisition means (S402, S403, S407) where at least one out of a drivable defocus amount and a driving speed regarding the focal position of an exchange lens is acquired from the exchange lens; and changing means (S410, S411, S412) where, based on at least one among the drivable defocus amount, drive speed and charge storage intervals in an image-pickup means for acquiring a signal used for focus detection, a lens drive system upon focus detection is changed. COPYRIGHT: (C)2010,JPO&INPIT
Bibliography:Application Number: JP20080316330