Last visit, I shot the Natural History Museum on Tri-X at 6400 using a lens with a maximum aperture of f/2.8. On my most recent visit, I shot at 1600 using a lens with a maximum aperture of f/1.4. For those playing the home game, this is a wash—I gained two stops on the lens and lost two on the supposed film speed.

These were also developed with HC-110, dilution B. It’s the same combination I used for these photographs.

I shot these all with a Leica M4 and Canon screwmount 50mm f/1.4 lens (with Voigtlander LTM to M-mount adapter). I metered using a Sekonic L-308S light meter.

Recipe for Tri-X @ 1600 in HC-110 dilution B:

Tri-X 135 (or Arista Premium 400 135)
HC-110 dilution B (18ml syrup + 562ml water for two rolls in a Paterson tank)
16 minutes total development
30 seconds initial agitation
3 gentle inversions every 2 minutes
1 minute stop bath
hypo clear
two drops LFN in last water, run film through this, hang to dry