In article <4q4huc$cgo@mordred.gatech.edu>, pgold@jedi.gatech.edu says...

>What are the major differenes between TriX, TMax [100] and PlusX films?
>I would also be interested in people's opinions on the best applications
>for each.

You have named three of the best B & W films around....
- Tri-X at 400 in D-76 1:1 (cut the time a bit from recommendation -
I like 8.5 minutes at 70 agitating every 30 seconds) has very normal
contrast, reasonably fine grain, and excellent sharpness. It is an
excellent general-purpose/low-light film, with nice tonal
characteristics, though I would choose one of the slower films
when better smoothness in non-textured areas is desired.
- Tri-X at 800 in Acufine has normal tonal range/shadow detail, with
some loss in sharpness and grain quality.
- Plus-X at 100 in D-76 1:1 (also cut the time a bit from
recommendation - I like 6.5 minutes at 70 degrees) also has very
normal contrast with good shadow detail, and somewhat finer grain
and a bit better sharpness than Tri-X. It is an excellent
general-purpose film with fine tonal characteristics, for use when
there is sufficient light.
- T-Max 100 at 40 in D-76 or 80 in Acufine has reasonably normal
tonal quality, with exceptionally fine grain and very high sharpness.
- T-Max 400 is too weird for words, IM(NS)HO, and is a special-purpose
film for use when rather contrasty shadows and highlights are desired,
as with studio lighting.
- T-Max 3200 is also somewhat weird, and vastly overrated at 3200 ASA
(its true speed is nearer 650-800, but even there, it is not tonally
normal, sharing with T-Max 400 a tendency for empty shadow areas
and contrasty highlights). Acufine and T-Max developers reduce these
faults, but at considerable cost in grain/sharpness quality. Maximum
speed (with coarse grain, poor sharpness, but acceptable contrast)
is about 2500 ASA - anything higher is VERY contrasty, in my experience.
BTW, Fuji Neopan 400 at 250 in D-76 (same development as Tri-X) is
excellent when greater than usual shadow detail and softer highlights
are desired (as when shooting on clear days with deep shadows).
Hope This Helps