[filmscanners] Re: 24bit vs more

["Peter Marquis-Kyle" <filmscanners@marquis-kyle.com.au>]

Austin Franklin wrote:
> How does the color calibration in
> VS work?  To close the calibration loop,
> you really need to take a picture of a
> known target and do so for each
> film/development/camera and/or
> lense (as different lenses render colors
> differently) etc., and even then there
> may be other variables that makes it
> not work as well as you might hope...
> like exposure/development etc. The
> only way to close the loop somewhat
> is to take a picture of a color target
> on each roll...which I did routinely
> when doing commercial work.

Austin, recent versions of Vuescan can create an
ICC device profile by scanning and analysing an IT8
or Q60 target. Of course this is only good for that
particular scanner and type of positive transparency
film, and can't adjust for the vagaries of lighting,
subject or camera.

Peter Marquis-Kyle
www.marquis-kyle.com.au




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