WKato@xxxxxxx wrote:
>
> <<[snip]... "Slide film maps a density range of 0:2.7 to an intensity range
> of
> 1:500, but negative film maps a smaller density range of 0:2.4 to a larger
> intensity range of 1:4000."
>
> Trnaslation for the digitally uninitiated, please, and comment on the
> implications.>>
>
> I quoted this because I don't know too much but I will attempt to render my
> understanding of this.
> Density range is measured logarithmically meaning that you get a doubling
> every 0.3 in density increase.
snip
There is an excellent and comprehensive discussion of this whole issue
on pages 85 through 93 of Ansel Adams' "The Negative".
John Hudson
Vancouver, BC
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