Digital BW, The Print

Loris,

> Anyway, it isn't grain either :)

Ernst,

> I'm in the my last t(h?)rench now :-) ... it isn't noise!

Norman writes in his report that at 300 ppi the 2450 produces
grain aliasing due to the stepping of the scanner that is then 8
times rougher. Less obvious with 600 and 1200 ppi. A grainy
colour negative as the subject. It is hard to predict when it
occurs and what the causes are.

So the grain doesn't have to be resolved to get the grain
aliasing effect.

I think it would be wise for Alessandro to check other
resolutions in scanning of the same negative and if that doesn't
help to change the film type he uses to see whether that helps.
The stepping of the 3200 could be different to the 2450 so the
2450 tests have to be translated.

Another 3200 observation; in reflection scanning the light source
is quite off center to the CCD. Or maybe as off center as other
scanners but the (very wide angle ?) optics of the Epson show it
more. A strong shadow at the end of the scanned paper, no shadow
at the start, texture shows. When I scan the same subject on the
Agfa Horizon Plus the texture is less visible. I like that
texture effect for art but wonder whether it will be a problem
with glossy originals. I've written before that when the original
isn't plane the reflected light fall off is also high, especially
at the edges.

Ernst