Here are some shots made during a foggy night in Oxford on Boxing Day last year, between 10pm and 12am. I chose to develop the film in 510 Pyro to see how well it held the highlights and I’m pleased to say it did exceptionally well as you can see from the pictures. The dynamic range between the street lights and the dark shadows in these night shots is huge but it didn’t seem to give 510 Pyro any problems. One of the last shots I calculated to be a 4 minute exposure with reciprocity but in hindsight I feel I miscalculated and overexposed the shot by at least 1.5 stops but the shot it still totally usable.

[Tech info:] Pentax 645N, 55/2.8, Ilford FP4, developed in 510 Pyro 1+100 for 11mins.