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Re: Scanning multiple times (was Re: filmscanners: Vuescan gripes)



Ed wrote:

>>You might get better results with underexposed negatives by
>deliberately blurring the focus by turning off "Device|Auto focus"
>and manually changing the focus.
>
>Of course, I could be completely wrong about this <smile>

This is an ungrateful thing to say, but in respect to the Acer, I get 
somewhat darker scans on *underexposed* negs with the native Mira driver. 
That's because the Vuescan driver (at least the way I've been using 
it--which is seat-of-the-pants flying, BTW) seems to give a slightly longer 
exposure than the Mira. This is *great* for underexposed slides and 
overexposed negs, however, which is where most of my problems are.

Best regards--LRA

Best regards--LRA


>From: EdHamrick@aol.com
>Reply-To: filmscanners@halftone.co.uk
>To: filmscanners@halftone.co.uk
>Subject: Re: Scanning multiple times (was Re: filmscanners: Vuescan gripes)
>Date: Sat, 21 Jul 2001 12:22:43 EDT
>
>In a message dated 7/20/2001 2:58:04 PM EST, smprastein@earthlink.net 
>writes:
>
> > I have an Acer Scanwit 2740S, which
> >  requires multiple passes to do a multiple scan.  I thought that this
> >  was the right thing to do to get lower noise when scanning at 16x. so
> >  as to be able to average the input from successive reads. And, I
> >  thought this would help in extracting info from seriously underexposed
> >  negatives.   Am I all wet on this?
>
>My experience has been that multiscanning doesn't help
>underexposed negatives at all, but instead is only
>marginally useful for overexposed negatives and underexposed
>slides.  It primarily helps get detail from dark areas on the film.
>
>It may appear to help underexposed negatives by essentially
>blurring the image on some scanners that can't accurately
>reposition the scanner.
>
>You might get better results with underexposed negatives by
>deliberately blurring the focus by turning off "Device|Auto focus"
>and manually changing the focus.
>
>Of course, I could be completely wrong about this <smile>,
>and it would be interesting to hear other peoples experience
>on this (especially seeing other people's web pages with
>examples of this).
>
>Regards,
>Ed Hamrick


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