Sounds like the UK publication from the dates. It ran on into the late 70's at least, then got rolled into another publication when the photography magazine market contracted around 1980 of so. It was an SLR specialist magazine, mostly 35mm with some rollfilm equipment. It had a good technical bias as I remember. That might have been what killed it 8-)
Interesting point you make about the photography market contracting. Do you know what caused this to happen ?