Sorry, I realize now that the original message was not "descriptive"
enough.

How ISO works on film is rather "material" - the grain of ISO 400
compared to let's say 50, has a different, more corse structure.

But how does it work for RAW in digital storage? "Approximation"
algorithms are not supposed to be applied and whatever light reaches
it should be recorded no matter what ISO is.

Any ideas?

On Mon, 11 Jul 2005 08:15:12 -0400, wrote:


Does anyone understand what are the mechanics behind the ISO settings
for RAW images?

Len