The A2100 IS has very good photo quality and the larger resolution lets you take better advantage of the results. Color, contrast, and white balance are particularly good. As is the norm for this class of cameras, the A2100 IS produces its best results at light sensitivities below ISO 200. Though there is some graininess/noise at all ISOs, it becomes readily noticeable at ISO 400, but for the most part details remains good. Actually, you can get up to ISO 800 and still have a usable photo at smaller sizes, as long as you're OK with the reduced detail and clarity. Center sharpness is good, but softens as you go out to the sides of the frame. There is some typical barrel distortion and purple fringing, but the amounts are in line with other cameras at this price point.