By Roger Lings on 10th December 2016
"Being a Professional Sports photographer in the1980's to 1995 I can cateogorically state that
when processing tmax 400 uprated to l600 and hp5 to l600, Microphen film developer can give excellent results when work with shutter speeds of 250,500 and a fast lens i.e Nikon 400 2.8 IFED "