Patent ID: 8223255

Claim:
An imaging apparatus comprising: an imaging section which images a subject and comprises plurality of pixels arrayed in a vertical direction and a horizontal direction; detecting means for detecting whether the imaging apparatus including the imaging section is held vertically or horizontally; readout means for reading out pixel information of the plurality of the pixels from the imaging section; readout controlling means for controlling a readout process of the pixel information executed by the readout means, in accordance with a detection result from the detecting means; calculating means for calculating an auto-focus evaluation value in accordance with the pixel information read out by the readout controlling means; and focusing means for focusing in accordance with the auto-focus evaluation value calculated by the calculating means; wherein the readout controlling means includes first addition readout controlling means for controlling the readout means to execute a pixel addition process of the pixel information of a plurality of pixels in the vertical direction, when the detecting means detects that the imaging apparatus is held horizontally, and second addition readout controlling means for controlling the readout means to execute a pixel addition process of the pixel information of a plurality of pixels in the horizontal direction, when the detecting means detects that the imaging apparatus is held vertically.