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[filmscanners] RE: Scanning negs vs. slides

Alex writes ...

> ..., I thought it would be worthwhile to check it out shooting
> similar images simultaneously on slides and negs,
> scan then on my IV ED and then to make final decision.

  For many subjects you may find very little difference.  Theoretically, any
difference with slides should be attributed to their optical density and the
possible number of f/stops.  Slides are usually attributed with an optical
density of not much more than '3', which limits the number of f/stops to
~10.  Negatives, on the other hand, are claimed to have the potential for
~14 f/stops.

  10 f/stops is a considerable amount of contrast, and should hardly ever
exceed normal subject matter, ... but you might run into problems achieving
shadow detail for a properly exposed sun-lit & snow-filled scene.

cheerios ... shAf  :o)
Avalon Peninsula, Newfoundland
www.micro-investigations.com (in progress)

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