Andrew Dacey wrote:
>Along with the other replise, I'd like to point out that there's a
>school of thought among some photographers that the stated film speed
>for negative films tend to be over-ambitious.
>
>
For color, I tend to think folks shooting regular subjects who make that
claim just have faulty meters. Now for many years, I've only shot Kodak
and a couple of recent rolls of AGFA.What I've found scanning the film
is that there is a great consistency of density at a level, and one that
makes capturing the full tonal range rather easy, between different C41
color films exposed at the manufacturers ratings. Maybe I'll try a
couple of intentional overexposures side by side with rated iso shots
some tome.
>I know with B&W the speed changes depending on the developer you use
>(usually it reduces the speed but sometimes it increases it). It
>wouldn't surprise me if it was the same for C41 process.
>
>
The C41 process as done by labs is highly standardized There is nothing
remotely like the differences in home developed B&W with different
developers, times, etc.
>I think the only film you can reasonably assume has an accurate ISO
>rating on the box is Slide film (E6 process) since there's such a
>small exposure lattitude with the film.
>
>
Then what's up with those folks shooting Velvia at different ratings?
Moose
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