Electronic camera and focus control method which minimizes the time required for adjusting a focus
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United States of America Patent
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Aug 20, 2013
Grant Date -
Oct 7, 2010
app pub date -
May 11, 2010
filing date -
Jul 31, 2000
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Abstract
An electronic camera includes a shutter button. When the shutter button is half-depressed, a focal level of an object is determined on the basis of an image signal outputted from an imaging device, and a moving start position of a focus lens is settled on the basis of the determination result. More specifically, a correction amount of the moving start position is settled in accordance with the determination result of the focal level, and a position that subtracts the correction amount from a lens position at a time the shutter button being half-depressed is settled as the moving start position. The higher the focal level, the more reduced the correction amount. The focus lens gradually moves toward the imaging device from the settled moving start position, and a focal position is specified on the basis of the image signal outputted from the imaging device at each step.
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