>> --Some "box speeds" are advertising copy, not ISO ratings (this is a fact).
>
> Are you talking about the films designed to be pushed (i.e. Ilford Delta
> 3200, TMZ (TMax p3200), and Provia 1600), where shooting at the "box
> speed" requires push-processing, or are you referring to other films
> as well? (Note that Kodak throws that 'p' into the name as their way
> of warning us that it's not really a 3200-speed film in normal processing.)
Glenn,
I don't know the whole list any more but many films aren't submitted to the
ISO procedure; probably the best known is T-Max 100. P3200 is, as you note,
a 1000-speed film designated to be pushed (P) to 3200.
I didn't find anything else in your comments I'd disagree with. It can be a
matter of interpretation and perspective....
--Mike
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