[pure-silver] Re: Grain; Now Digital enlargers
- From: "Tim Rudman" <tim@xxxxxxxxxxxxxxx>
- To: <pure-silver@xxxxxxxxxxxxx>
- Date: Fri, 13 Jan 2006 08:08:53 -0000
Thanks Rob. I think I will follow that up
Tim
http://www.worldbookoflithprinting.com
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From: pure-silver-bounce@xxxxxxxxxxxxx
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Sent: 13 January 2006 01:47
To: pure-silver@xxxxxxxxxxxxx
Subject: [pure-silver] Re: Grain; Now Digital enlargers
I enquired of Odysey some time ago about the devere digital enlarger.
One thing that is conspicuous by its absence is any details about the pixel
dimensions of the LCD panel.
If I recall correctly, a 12x16inch print would produce approximately a
200ppi print. This is not enough ppi for quality to be anywhere near equal
to a traditional monochrome print.
Ask for the lcd array dimensions and calculate what that means in terms of
dpi in the print. Anything less than about 8lp/mm(16 p/mm) means it wont be
as good as a negative projected onto paper. The fact that it moves during
printing only serves to blur the pixelation in the print which will also
reduce the resolutoin in the print.
Tim, if I'm not mistaken you are not too far from Caterham to go down to
Odysey and take a look at one of these machines in action.
I did a recent test of a B+W digital file having it printed on an epson wide
format printer(300dpi), a laser printer(Fuji Crystal Archive paper at 254
dpi) and a typical highstreet photo LCD projection printer. The LCD print
was the worst by a long way. The Laser print (www.photobox.com) was easily
the best. The inkjet was good but diifferent from a silver gelatin fibre
based print. I think the LCD matrix in the DeVere needs a lot more pixels in
it but it really depends on your own criteria of what is "good enough".
rob champagne
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