An object of this invention is to provide a photoelectric conversion
device which can always appropriately perform charge accumulation
independently of the luminance levels of objects, can read out an image
signal by effectively using the dynamic range, can attain accurate
auto-focus, and can realize them at low cost without increasing the
circuit scale. In order to achieve this object, a memory is provided for
each photoelectric conversion element, and a controller controls charge
accumulation of the photoelectric conversion element on the basis of
control information read out from the memory.