Digital BW, The Print

----- Original Message -----
From: "mh" <mh@...>
To: <DigitalBlackandWhiteThePrint@yahoogroups.com>
Sent: Saturday, March 15, 2003 2:09 PM
Subject: Re: [Digital BW] RE: Is this noise or what? (was: Epson3200 - Test
results)


> It is grain, but it isn't being resolved very well so there may be a
> little "aliasing: going on. Your previous calculations were correct but
> you were forgetting that photography paper has a resolution as well.
> This, with the fact that there are optical systems involved, are why
> you can not see the grain on every 10x13 enlargement of 35mm. I start
> to see the grain on every scan from my drum scanner at a resolution
> higher than about 2000 dpi.

But that's a drum scanner; things are quite different for consumer flatbeds
like 2450/3200. I cannot get satisfactory scans (sharp) without applying 3x3
pixel unsharp mask in the scanning application (Silverfast Ai 6). What I
know about drum scanners is that there's no need to apply unsharp mask more
than around 0.7 - 0.9 pixel radius. This should perfectly tell you about the
resolving capacity of the Epsons.

Regards,
Loris.