filmscanners: Re: Autoexposure problem in Vuescan

["Alan Tyson" <AlanTyson@bknowl.freeserve.co.uk>]

I have taken to leaving a deliberately blank frame on every
film in order to scan it for the mask. Sometimes I find
Vuescan's results better with these settings, and sometimes
not; I have to try it and see. Perhaps this is because I
have a Scanwit, on which Vuescan can't control the exposure.

BTW, after suffering a processor's lost film mixup,  I also
photograph another frame from the computer screen showing my
name & address (and a bit of Ed Hamrick's Vueprint test
chart).

Regards,

Alan T


----- Original Message -----
From: Rob Geraghty <harper@wordweb.com>
To: <filmscanners@halftone.co.uk>
Sent: Thursday, September 20, 2001 12:11 AM
Subject: filmscanners: Re: filmscanners: Autoexposure
problem in Vuescan


> > .....The problem is that VueScan is expecting there to
be some
> > part of the scanned image to be somewhat unexposed.  If
> > you're taking pictures of the sky, the negative is
usually
> > quite dark and VueScan mis-computes the color of the
orange mask........
>