I think the most versatile fast black and white film on the market today is Ilford Delta 3200, which can be rated from 800 to 25,000. I use it in medium format only, and at EI 800 it has quite remarkable sharpness and gradation. I have a Delta 3200 page at http://unblinkingeye.com/Articles/D3200/d3200.html that contains developing information gleaned from other contributors to this forum.(posted 8871 days ago)