[pure-silver] Re: digital photo list? epson 4990 scanner?
- From: Peter De Smidt <pdesmidt@xxxxxxx>
- To: pure-silver@xxxxxxxxxxxxx
- Date: Thu, 15 Sep 2005 07:55:42 -0700
Shannon Stoney wrote:
Is there a digital photography list? I have a question about the Epson
4990 scanner and scanning big negatives on it.
In case it's ok to ask that question here: I looked at one of these
scanners today. It seems that when you scan an 8x10 negative or
transparency, the film sits right on the glass. I would think that
that could cause newton rings or focus problems. The holders for
other sizes of film hold the film about 1mm away from the glass. I
read somewhere on the internet that the focus for this scanner is sort
of between 0 (on the glass) and 1mm (in the holders). So I wonder if
you can tell in the prints that the focus is not spot on. Maybe this
doesn't matter.
But what about the newton rings?
--shannon
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I have a Canon 9950F which I use to scan 8x10 film. To solve the
Newton's rings problem, I bought a 8.5x12 inch piece of anti-glare glass
from a frame shop. This glass has a fine texture very similar to
anti-Newton glass, although the framing glass is significantly cheaper.
I then taped a few pieces of film in each corner of the glass to act as
feet that raise the negative off of the glass platen of the scanner. To
scan, I tape the edges of the 8x10 negative to the glass "negative
carrier", which I place on the glass platen of the scanner. This has
eliminated my Newton's rings problems, and I haven't seen any loss of
scan quality, but then I'm not making huge enlargements.
Hope this helps.
-Peter
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