The W290 goes from ISO 80 up to ISO 3,200, but usability drops off significantly above ISO 400 (typical of cameras in its class). However, even at ISO 80, photos viewed at full size have a grain to them that only gets more pronounced as sensitivities get higher. It had little-to-no impact on large prints (13x19 and below) made from test shots taken up to IS0 400. If you're planning to make prints that large, just keep the ISO as low as possible.