RE: filmscanners: Scratch the Gear Teeth Theory

["Lawrence Smith" <lsmith@lwsphoto.com>]

I've found something out.  Thanks to Howard Slavitt who suggested to me that
the issue might actually be with the profile conversion I tried some various
settings.  Heres what I have discovered.  If I make individual adjustments
to the RGB channels in Nikonscan the banding appears.  If I make no
adjustments, no banding.  I have not yet tried making an overall correction
to the master to see if that causes the problem as well.  Perhaps one of you
other 8000 owners can try this as well.

Lawrence

> -----Original Message-----
> From: owner-filmscanners@halftone.co.uk
> [mailto:owner-filmscanners@halftone.co.uk]On Behalf Of rafeb
> Sent: Wednesday, July 18, 2001 10:09 PM
> To: filmscanners@halftone.co.uk
> Subject: filmscanners: Scratch the Gear Teeth Theory
>
>
>
> A quick measurement of those "teeth" on the 8000 ED
> film holders shows 8 teeth per inch (0.125" pitch.)
>
> OTOH, the banding that I've seen has a period (width)
> of about 30-35 pixels, which is well under 0.01" at 4000 dpi.
>
> Scratch that theory.
>
>
> rafe b.
>
>