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Re: filmscanners: Glass slide mounts

On Thursday, October 18, 2001 at 23:55, Neil Cotty 
wrote re "filmscanners: Glass slide mounts" saying:

> Hi all,
> I know this has been said before here, but I thought I'd just reiterate it
> in case others missed out. I have an LS4000 scanner and shoot with mainly
> Provia or Velvia. I've been 'sort of' happy with the sharpness of the scans,
> resigned to using various sharpening methods post scan - no getting around
> that. But - today I received a set of glass slides - Quickpoint- on the
> advice of others around the Internet. Fantastic. Unbelievable difference.
> I'm getting much better results, much sharper. So for the cost of a few
> cents - I picked up 300 on Ebay for a few pounds - it's well worth the
> money.
> One side effect though, maybe someone can tell me why this is happening.
> With a few slides, say 10%, I am getting this erm, multi-coloured circles
> and unusual shapes appearing on the slide. I guess it is the film itself
> perhaps slightly curved, 

Exactly the opposite - the film is as flat as the glass!

> and light playing tricks - or could it be some left
> over residue from development? It does look like a liquid! 

Newton's rings. See 

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