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European glass not available in the US
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PostPosted: Fri Aug 08, 2008 7:48 pm    Post subject: Reply with quote
Katastrofo wrote:
Peter, in my above setup, am I doing something drastically wrong?

Bill

Well, from your descriptions I can't work out what you're doing. Maybe I've got it all wrong.

This is a flatbed scanner, yes? The lens is in the base and the light is in the lid, shining through the neg/slide. With a film holder you wouldn't use any additional glass so I'm assuming you're using the glass to mount the film flat. The film needs to be on the lens side of the glass - the underside. Why do you need ground glass?


PostPosted: Fri Aug 08, 2008 8:02 pm    Post subject: Reply with quote
Peter, yes the film is taped to the underside of the glass, so nothing between
Scanner bed and film. Taping the film to the etched or dull side was to
alleviate Newton rings, but moot point if film is taped flat to glass, correct?
I'm not the author of this method, merely trying to adapt to its description
with materials at hand.

I just checked and single strength windowpane would run only $2.30, same
dimensions.

Bill


PostPosted: Fri Aug 08, 2008 8:23 pm    Post subject: Reply with quote
OK, now I'm clear. Looking at the scans you posted, the film and the scanner are OK, so the contrast problem has to be caused by the extra glass.

If the only reason for using the glass is to keep the film flat, could I suggest you get rid of it and make a mask from your black card, with a 56 x 56mm cut out, and tape the film to the underside. I'm not sure you need to worry about focus too much because the scanner is designed to focus on documents directly on the flatbed - maybe the depth of field of the lens covers a few mm variation. Using the coins under the film to space away from the flatbed glass is a great idea.


PostPosted: Sat Aug 09, 2008 2:31 am    Post subject: Reply with quote
Peter, think I'll just get ANR inserts for my filmholders from Betterscanning
and be done with this. For one, this is way too fiddly if you have a lot of
scans to do.


PostPosted: Sat Aug 09, 2008 2:28 pm    Post subject: Reply with quote
Katastrofo wrote:
this is way too fiddly if you have a lot of
scans to do.

I think so too! Wink


PostPosted: Thu Jun 17, 2010 10:41 am    Post subject: Reply with quote
Bump for Moira


PostPosted: Thu Jun 17, 2010 10:54 am    Post subject: Reply with quote
Thanks Peter!
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