Pixel Perfect wrote:
Tom do you use ISO 6400? I wouldn't use it on a 5D II. 90% of MY shooting is ISO 100-800 with 90% of that ISO ISO 100-400.
I occasionally use 6400. I've used 3200 a fair amount. Depends on the conditions, of course. I'm of the mind that flash is a distraction sometimes at events so I tend to use it sparingly.
I like the 5D2's 3200, but I'd have kept the 12.8 mp sensor if the 5D's high-ISO performance could have been improved even beyond what the 5D2 offers.
My comparison testing showed about a 2/3 of a stop difference when the equally-exposed images are compared, keeping in mind that the original 5D's ISO settings were 1/6 to 1/3 stop more sensitive than the "standard".
For me, its all about latitude - low noise at the dark end, and plenty of headroom at the bright end of the exposure spectrum.