Canon ISO Noise
On Canon EOS cameras lower ISO settings have less noise.
The situation with Video noise is a little different to what you expect. ISO 160 has lower noise than ISO 100 (the lowest setting). In fact it has been found that the order for lowest noise to highest is:
160, 320, 640, 100, 200, 400, 800, 1250, 125, 250, 500, 1000, 1600, 2500, 2000, 3200, 4000, 5000, 6400
Tecnicolor.com mentioned this and it has been confirmed by user tests (for example http://vimeo.com/23082874 and http://vimeo.com/10473734 ).
Is this true for Photographs?
I did a test of the ISO noise of a Canon 60D Read More