Here is another experiment with Diafine. I am not sure what the shutter speed was or aperture either. I was shooting with a 40mm 1.4 lens and was close to wide open. I used Trix shot at 1250iso. So far I am sold on Diafine. It is about the best developer I have used. Concert shooting with a fully manual camera is very tricky. I used my M6.
DSLR's were am no no at the show.