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Canon PowerShot SX150 IS takes very good photos for its class, though like most compact cameras it's at its best below ISO 200. At ISO 400 there's a noticeable increase in noise and softness from noise reduction. (However, there's visible noise even at its lowest ISO.) Photos at higher ISOs are usable for smaller prints and the Web as long as you don't enlarge and heavily crop them. The increased noise at ISO 1600 does cause some faint yellow blotching.