10-26-2010, 07:52 PM
I have the 7D which is near enough the same sensor and I use ISO3200 routinely. It does lack the punch and dynamic range that lower ISO settings can offer, but it if it gets the shot when light is lacking, I don't hesitate to use it.
<a class="bbc_url" href="http://snowporing.deviantart.com/">dA</a> Canon 7D2, 7D, 5D2, 600D, 450D, 300D IR modified, 1D, EF-S 10-18, 15-85, EF 35/2, 85/1.8, 135/2, 70-300L, 100-400L, MP-E65, Zeiss 2/50, Sigma 150 macro, 120-300/2.8, Samyang 8mm fisheye, Olympus E-P1, Panasonic 20/1.7, Sony HX9V, Fuji X100.