[filmscanners] Re: Density vs Dynamic range

["Todd Flashner" <tflash@earthlink.net>]

>>> but the
>>> slide film in fact has less dynamic range than negative film, though slide
>>> film does have a higher density range.

>> So please
>> explain what you base your assertion on.

> Actually, it's not my assertion, but something that has always just been a
> given amongst professionals I have spoken with about this, and what I've
> read.

I would presume that what is said is that "neg film can HOLD a greater
dynamic range than slide film". In this case dynamic range is a misnomer -
what is meant is it can hold a greater luminosity range, as the visual world
is made up of reflected/transmitted light, not density.

So, there must be a point at which either film may of itself HAVE (not hold)
a higher dynamic range, and the parameters of that would include the scene's
luminosity range, exposure, development, etc. IOW, how the scene is tailored
to fit within the density range of the film.

Sorry to nit-pick the issue, it's just that so much of the dynamic range
conversation seems to hinge on exact definitions it seems relevant. Maybe
not.

Todd

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