[filmscanners] Re: SS4000 again

["Bob Frost" <bob@frost.name>]

Tom,

Surely the whole purpose of collimated light sources is to achieve maximum
resolution (I seem to remember this from my light microscopy days many years
ago). If you use diffuse light, you will not achieve max resolution: it's
equivalent to blurring the image. The Minolta 5400 has a removable diffuse
light filter, and if you switch it into position, you lose resolution, and
the image becomes soft. You also lose resolution on the dust and scratches,
but you can't have one without the other (as Doris Day used to sing).

Bob Frost.

----- Original Message -----
From: "HPA" <tom@historicphotoarchive.com>

DIFFUSION OF LIGHT SOURCE: The Polaroid uses diffuse light, which minimizes
dust and scratch marks on the base side of the film. The Nikon uses
collimated light and this accentuates dust on the base side.  Of course the
Nikon has the automatic dust removal, however that does not work with
Kodachrome because the film is opaque to IR light.


----------------------------------------------------------------------------------------
Unsubscribe by mail to listserver@halftone.co.uk, with 'unsubscribe 
filmscanners'
or 'unsubscribe filmscanners_digest' (as appropriate) in the message title or 
body