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Re: filmscanners: Vuescan long pass mode



Ed,
        is this why some of my 35mm. negative scans look a tad 'thin'
when using VueScan and more 'gutsy' when using CanoScan?

Chris.


----- Original Message -----
From: <EdHamrick@aol.com>
To: <filmscanners@halftone.co.uk>
Sent: Friday, February 09, 2001 11:05 AM
Subject: Re: filmscanners: Vuescan long pass mode


> In a message dated 2/8/2001 9:33:58 PM EST, bjs1@home.com writes:
>
> > Are you sure it works on other CCDs ?
>
> Yes, with varying degrees of success.
>
> >  For example I used a pin and poked three different size holes in
a very
> dark
> >  Provia 400F slide.   The 2 pixel hole showed no charge bleeding,
the 10
> >  pixel hole showed medium charge bleeding and the 40 pixel hole
showed a far
> >  amount of bleeding.   In all cases, the red seemed to bleed more
than the
> >  green which bled more than the blue.  Also the bleed seems to be
only in
> one
> >  direction.
>
> Yes, other people have reported these same characteristics of the
> CCD in the Canon FS2710.
>
> I've been saying on this mailing list for more than a year that
> overexposing the CCD would have charge bleeding problems.
> This limits the usefulness of the long exposure feature on
> some scanners.  It's a hardware limitation, and there's not a
> lot I can do to work around it.
>
> Regards,
> Ed Hamrick




 




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