Archived posting to the Leica Users Group, 1999/09/26

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Subject: Re: [Leica] Re: Kodak C-41 Tri-X
From: Godfrey DiGiorgi <ramarren@bayarea.net>
Date: Sun, 26 Sep 1999 12:19:23 -0700

><< Kodak's T400CN film shares many of the characteristics of XP2 but Kodak's 
> focus in its development is somewhat different. T400CN has a shorter toe 
> (more contrasty) and evidences a bit more grain, particularly on 
> overexposure. It will block up the highs when overexposed by 1 stop, but 
> will hold detail in the midrange better when underexposed. Exposed on its 
> nominal EI 400 or up to 1 stop under, it returns extremely high quality 
> results.  >>
>
>I find just the opposite.  T400CN produces the best results when exposed at 
>EI 320, which tightens the grain and expands the tonal range exactly like 
>with any color negative emulsion, which it what it is.

EI 320 is +1/3 stop from the rated speed and I agree, T400CN handles that 
nicely. But at +1 stop (EI 200), it blocks up the highlights where XP2 
does not.

Godfrey