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Re: filmscanners: Stellar ghosts and Nikon Coolscan IVED (LS40)
Harry Lehto wrote:
> On Thu, 10 May 2001, Harry Lehto wrote:
>
>
> I first though that they could be some kind of reflections from the
> different dye layers of Kodachrome, but as they appeared also in
> Ektachrome and Fujichomes that theory went into tha trash can.
>
> Regards
> Harry
Let's not forget that scanners have optics (lenses) and some even have
mirrors, and lenses in scanners are probably no less likely to have
aberrations (not to mention apparitions ;-)) like internal reflections,
distortion, loss of contrast, poor resolution on edges, flare, and all
those things you see on lens reports. This is exactly why one needs
independent testing, as is sometimes done with camera lenses when reviewed.
I'm guessing this is internal reflection between elements of the lens.
Art
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