Re: maximum grain was Re: There are a lot of mistakes in th

["Sandor Mathe" <sandor.mathe@xxxxxxxx>]

George L Smyth <GLSmyth@xxxxxxx> wrote:
> I can only speak from experience.  You may wish to try the experiment I went through
> to get my results.  The following is a portion of what I did.
> 
> I took pictures of a scene, bracketing each shot.  I selected EI 60, 125, 250, 500,
> and 1000.  When I finished I had seven groups of the bracket.  I then cut the film
> into seven strips and developed each strip for a different time.  Finally, I printed
> all 35 images, attempting to match each one (was not possible, but in many cases I
> came somewhat close).
> 
> I then had a handful of prints that I was able to use as a guide.  Without doubt, the
> lower EI gave me much higher grain than any other factor.  As a matter of fact, I was
> not able to come close to matching the EI 50 prints with the others because of the
> low contrast level.  Perhaps you will have different results.  This took me a full
> weekend, but has been very important in my understanding of this film.
> 
> I don't have Joe Paduano's book (when's the new edition come out, Joe?), but Laurie
> White's book has examples of the differences when HIE is shot at EI 50, 100, 200 and
> 400 (page 51).
> 
> george 

Well, I certainly can't argue with experience (especially
such well planned and executed experience :-), I haven't shot
these tests with HIE, but have done equivalent though less rigourous 
tests with TMAX and definitely saw more grain with overexposure.
I have also read in A. Adams the same thing (more grain with 
overexposure).

Colour negative films on the other hand get more "grainy" with
underexosure. Grainy is in quotes since they have no grain only dye
clouds.  But this is a different effect since the dye clouds are 
transparent.  Maybe the sensitizing dyes in HIE have such a dramatic 
effect that they completely change the behaviour with regard to 
grain.

Curiuous, what were your development conditions? (I assume something 
like  N, N+/-1, and N+/-2) but what developer, temperature, and times?

I'll keep this in mind.  Thanks,
Sandor Mathe  -- sandor.mathe@xxxxxxxx
(905) 670-1225 x333  --  FAX (905) 670-1344
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