From: cor (cor@lumc.nl)
Date: 03/25/01-08:50:58 AM Z
This thread made me wonder about the following (one of those on the
shelf projects..)
What contrast range (stops) is possible with reverse processed Technical
Pan (or Tmax100), seems to me that the range must be higher than the
mentioned 3 stops for chrome film
Cor
Carl Weese wrote:
>
> Sandy,
>
> This is the old problem of two kinds of range. Chrome films, once processed,
> have enormous density range. But their ability to capture original subject
> tonal range is dismal. That's why my commercial photography kit consisted of
> a forty pound case with cameras and lenses, and a hundred and forty pounds
> of lighting equipment.
>
> Slide film takes a subject with three stops of lighting range and makes a
> 4.0 range piece of film. A subject with a six stop range results in a slide
> with 4.0 density range, with half the subject matter at 4.0, unless you use
> artificial lighting to reduce the lighting ratio to match the film's limited
> ability. I'd expect slides of deeply overcast scenes to make great originals
> for enlarged negatives. Any subject more contrasty than that will look awful
> without masterful use of artificial lighting.---Carl
>
> >
> >>2. Slide film has a much lower range of tones compared to B&W film.
> >
> > How is this? We generally expose B&W negative material to a maximum DR of
> > about 1.05 for silver, and 1.4 - 2.2 for alternative processes. Exposed and
> > develped slide material has a DR of up to 4.0. How could there be less
> > tonal range in the slide?
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