[filmscanners] Re: Batch scanning with silverfast

["Arthur Entlich" <artistic@ampsc.com>]

Just a guess, but some scanners focus using contrast elements within the
image.  If the focus test point happens to be a very soft image area on
one which has no contrsting elements within it, the scanner may be
unable to find something to use as a reference to focus.

Art

Craig Auckland wrote:

>
>
> I have been batch scanning 35mm slides (using the Polaroid 120) following
> Ian Lyons workflow method; the system works fine except every so often a
> scan is completely out of focus. I scan about 60-100 images in one lot (all
> scanned to file) then open the files in Photoshop; about 3 in every 50 are
> out of focus??? Anybody experienced the same? Or know why? There does not
> seem to be a pattern or anything - with the out of focus slide being next to
> two perfectly focused slides.
>
> Craig
>


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