Quote:
Originally Posted by rogerco
Thanks for all the comments, especially Greg for the detailed reply. I had read elsewhere that 400 - 800 - 1600 was the most likely range but Bracken's book made me wonder about zero or unity gain.
The book is very well written by the way, just starting to get into the processing chapters.
God, just watching the tornado damage in the USA, that was one big twister.
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DXO Mark has a measure for highest ISO with no image quality loss for different cameras. Its worth a check for your camera.
Here it is here:
http://www.dxomark.com/index.php/Cam...(brand3)/Canon
As you can see it varies a lot by brand and model. For 600D it is ISO793 but for Nikon D800E is it 2979, for Canon 6D it is 2340, 5D2 ISO1815, 5D3 ISO2293, 1100D ISO755, 7D ISO854, Sony Nex 6 ISO1018, Nikon D600 ISO 2980 Sony Nex 5R ISO910, Sony Nex 7 ISO1016. Fuji XE1 would be similar to Nex 6, perhaps a bit higher IS01250 or so (not listed by DXOMark).
So there really can be a different best ISO for each camera.
Greg.