Reggae: Canon EOS 7D beta + EF 85mm f/1.2L II, ISO 3200. Click photo to enlarge (Photo by Rob Galbraith/Little Guy Media)
The links below are to ISO 1600, 3200, 6400 and 12,800 full-resolution files shot with a beta 7D during the same performance as the photo above. For comparison purposes, you can also download ISO 3200, 6400 and 12,800 photos taken with a 5D Mark II. This was tough light, and the files from both cameras show that. The 7D's performance is staggering, given its sensor's 4.3µm pixel pitch. But the 5D Mark II and its 6.4µm pixels are able to extract just a bit more quality out of each ISO increment. All files originated as RAW CR2s. They were converted in Digital Photo Professional 3.7 and then sharpened using Smart Sharpen in Photoshop CS4 before being saved for download as low-compression JPEGs.
http://www.robgalbraith.com/bins/multi_page.asp?cid=7-10042-10239