"Lloyd Erlick" <Lloyd at @[EMAIL PROTECTED]
dot com> wrote in
message news:68u3h3p9p48h6er15tma9laoejakir9ngp@[EMAIL PROTECTED]
> On Sun, 14 Oct 2007 01:42:21 GMT, Jean-David
> Beyer <jeandavid8@[EMAIL PROTECTED]
> wrote:
>
> ...
>>I do not understand how you could get such different
>>results. I like TMX
>>film when speed permits, but otherwise I like old TMY (I
>>have not tested the
>>new). The old TMY, in Xtol developer 1+1 with water,
>>developed in a Jobo
>>CPE-2 processor gives the straightest line D:H curve I
>>have ever seen right
>>down below Zone I. Tri-X 4164 has such a long toe that it
>>has very low
>>shadow contrast, requiring sufficient exposure to get
>>things off the toe.
>>The amateur Tri-X in 35mm format has a very different
>>curve. Was that what
>>you tested?
>
>
>
> October 14, 2007, from Lloyd Erlick,
>
> TMY confounded me for a while, too, when I
> first started using it. The highlights indeed
> are quite capable of becoming much too dense.
>
> But I found that dilute D-76 (I like 1+1) or
> Xtol (1+2) did a very nice job on it. And it
> is especially im****tant to rate the EI of TMY
> as 200 or 250, not the advertising claim
> printed on the box. In any case, for my
> ****traitistical purposes, a low EI yields
> beautiful shadow detail and gorgeous skin
> tonality.
>
> I did not like TMY very much at first,
> either, but it's a very, very good and useful
> tool. I hope Tri-X never disappears, because
> it too is a beautiful tool, and significantly
> different from TMY. Altogether a good pair of
> films. The vast majority of my ****traits have
> been done on TMY for the last ten years or
> more.
>
> regards,
> --le
> ________________________________
> Lloyd Erlick ****traits, Toronto.
> website: www.heylloyd.com
> telephone: 416-686-0326
> email: ****trait@[EMAIL PROTECTED]
> ________________________________
> --
I think it should be reiterated that the ISO speed of a
film is the result of a controlled test with a specific
contrast and developer. If one wants a different speed or
uses a different deeveloper than was used for speed testing
the effective speed will be different. Also, the ISO speed
method traces its requirements back to the Jones minimum
usable gradient method used by the ASA until 1958, namely
the _minimum_ exposure that will produce good tone
rendition. Where the film is shot and processed under
different conditions than those assumed by the test the tone
rendition may not be satisfactory.
Because color films and B&W motion picture films are
processed using much more standardized contrast and
development the ISO speeds are much more consonant with
actual usage.
--
---
Richard Knoppow
Los Angeles, CA, USA
dickburk@[EMAIL PROTECTED]
|
