http://terragalleria.com/blog/2011/03/22/best-iso-for-low-noise-on-canon-5d-mk2/The results are actually well expected, the immediate intermediate ISO right below each "real" ISO has better (signal-to-)noise performance than the immediate intermediate ISO right above each "real" ISO.Indeed, I had tested myself with my 5D long time ago and confirmed the same, when no Pentax DSLR had any
