The T900 takes its best photos at and below ISO 200, though some color noise is always present. At ISO 400 things start to get fuzzy and, well, it's all downhill above that. Don't expect great photo quality in low-light without a flash.
2 of 8 Joshua Goldman/CNET
For only having a 35-140mm-equivalent lens, the T900 has noticeable pincushioning (top) and barrel distortion (bottom).
3 of 8 Joshua Goldman/CNET
The Sony T900 has very good center sharpness for an ultracompact camera.
4 of 8 CNET/Joshua Goldman
While the T900 takes its best photos between ISO 80 and ISO 200, you can see in this 100 percent crop of an ISO 80 photo that there is noise/artifacts even at this setting. Fortunately, you can't really see it at smaller sizes.
5 of 8 Joshua Goldman/CNET
Squirrel!!! Though I have no immediate need to print a 13x19 photo of a squirrel, maybe you do. In that case, notice that the 100 percent crop suffers from some mushy detail courtesy of the increased noise reduction at ISO 400.
6 of 8 Joshua Goldman/CNET
The amount of purple fringing isn't abnormal in this shot or in any of my other test shots--but it's definitely there.
7 of 8 Joshua Goldman/CNET
The dynamic range on the T900 is limited. However, Sony's Dynamic Range Optimizer Standard and Plus (DRO) feature helps out a bit. From left to right: DRO+, DRO, and DRO off.
8 of 8 Joshua Goldman/CNET
The T900 in its Normal color mode produces pleasant, natural colors. Occasionally reds came out a little too vibrant, but overall the results were very good.