Solid-state imaging apparatus and camera system

A solid-state imaging apparatus comprising:

• a plurality of photoelectric conversion units;
• a plurality of read out circuits arranged correspondingly to each of the plurality of photoelectric conversion units, wherein each of the plurality of read out circuits includes a maximum value output unit for outputting a maximum value among a plurality of pixel signals input to the readout circuits from the corresponding photoelectric conversion units, and a minimum value output unit for outputting a minimum value among a plurality of pixel signals input to the readout circuits from the corresponding photoelectric conversion units;
• a signal output line connected commonly to outputs of the plurality of read out circuits;
• and
• a switching unit for switching between an output from the maximum value output unit and an output from the minimum value output unit, during a period of accumulating a pixel signal.