Rollei RPX 400

RPX 400 is coated for Maco by Harman Technology in the UK, the Ilford-owned plant that also produces Kentmere 400 and the current AgfaPhoto APX 400 repackage. The emulsion follows a traditional cubic silver-grain approach rather than the T-grain or delta-crystal architectures that Kodak and Ilford introduced on their flagship lines from the 1980s onward. At ISO 400 the grain is visible and deliberate, not the refined texture of T-MAX 400 or Delta 400.

For available-light work where you want a traditional look without paying Ilford or Kodak prices, it fills the gap. Street photographers who process at home and care more about cost-per-roll than maximum technical refinement tend to find it satisfying. The tonal range is solid, shadow detail holds reasonably well at box speed, and the highlights are not overly compressed.

Pushing to 800 is clean enough to be useful. Beyond 1600 you are asking more of it than the emulsion wants to give; grain blocks and shadow detail gets thin. HP5+ or Tri-X are better push candidates if you regularly need 3200.

In 120 the grain renders more cleanly than in 35mm, as it always does, and the negatives enlarge with room to spare for standard print sizes. Sheet film users wanting a cost-effective fast option for environmental portraiture or documentary work have fewer traditional-grain choices than they used to; RPX 400 is one of the remaining ones.

The reciprocity exponent is 1.31. Zone Light Meter applies the correction past one second; at 400 speed you hit that threshold mainly in low interior light with small apertures or heavy filtration. The correction table behavior is identical to HP5+ and Tri-X at this exponent, so your intuition carries over between stocks.