The Economist article on mirrorless cameras

Started 2 months ago | Discussions thread
Erik Magnuson
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Sometimes known as ISO-less processing
In reply to Jerry Fusselman, 2 months ago

Jerry Fusselman wrote:

If my prediction is correct, that is the reason not to go beyond ISO 1600 when you want the best possible image with your equipment under the circumstances.

When looking at DxO DR data, look for non-linear sections of the graph. Where the graph is linear, it makes essentially no difference what the camera ISO is actually set at as long as you process for the desired brightness (your raw converter may have limited range.)  The A7R is pretty much ISO-less from ISO 100 to 6400.  The Canon cameras start getting linear after ISO 1600.   That's why ISO 1600 is the point where the results start to become very similar .

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Erik

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