The S90's photo quality is impressive for a compact camera. However, like most of Canon's PowerShot line, ISO 400 is about the limit before you start seeing softening of fine detail. On the other hand, noise is minimal and the suppression isn't heavy to the point of destroying all detail until ISO 3,200. The S90 lives up to Canon's improved low-light performance claims. Colors are also consistent through to ISO 1,600, so usable photos at small print sizes are possible.