Fred:(posted 8181 days ago)Tri-X at 1200 ASA in Diafine for 3 minutes is no joke, it works and its capacity seems to go forever. Forget the optimistic 1600 ASA rating on the Diafine label, its an honest 1200 ASA with Tri-X. I have shot over 100 rolls in the past few months using this combination -- the 16X20's sing.
The next step is TMZ at 3200 ASA, developed per the T-Max developer instructions for that rating, its really the only other high speed option I've used and it works really well in low contrast light.
Carpe luminum.
MH