How many bits does the AD conv. of the 20D have?

[dlashier]

> I'm using CR V2.4 while you tested V1.

V2.4 will show better primarily because the color noise control which defaults to 25 and also causes loss of detail. If you slide it to 0 you'll find about the same results as v1. I think you'll find similar behaviour with DCRAW.

- DL

[afalco]

CLoser examination showed that I was wrong. DCRaw created blotch-free jpgs, because it uses a blcak point of 0. The blotchines in CR is the fault of CR's conversion curve (I mean how it converts the linear AD values to logarithmic levels.) When I select a 'Shadows' value greater than a given treshold (sometimes this treshold is 0) the darkest pixels meld and this creates the blotchiness.
But now I know how to fight it!