I recently acquired 2 rolls each of Delta100 and FP4+. Since I only have 2 rolls each, and I don't know their expiry status (though they look pretty new), I'm just going to shoot them and develop them as closely as I can to a "recommended" scheme (read: massive dev). I shot a roll of each on a recent California trip, and my my are they different! Here's a quick comparison to my go-to Tri-X, which I now shoot at EI800 and develop in HC110B for 8 minutes, and I am consistently pleased with the results.
So now for the shootout. The camera: Olympus XA. The developer: HC110. The films: as follow
Tri-X@800, HC110B 8minDelta 100, HC110H 12min (massive dev said HC110B 6min, I usually develop TMax100 in HC110H 12min, so it all checks out)
FP4+ 125, HC110H 10min (massive dev had 3 conflicting dev schemes, so I went with the dilution and time that I use for Tri-X @400, under the assumption that FP4+, as a traditional grain emulsion, is roughly equivalent to Tri-X)
So now my own observations. Using Tri-X as a baseline, Delta 100 looks like it has a soft "glow", almost making it look like it's soft focused. Also a lot less contrast than Tri-X.
FP4+ is quite a beast. It vignetted all my shots (especially skies ... is it less sensitive to blue than Tri-X?), and is super grainy and contrasty. "High accutance" I think is the technical term. I'm leaning towards blaming my development scheme for this. 10 minutes with agitation once every minute might be too much? Anyone else develop FP4+ in HC110? I also recall that the couple of rolls of expired FP4+ I shot turned out very similarly, so maybe it's expired? In any case, I don't think I'll be trading my Tri-X for FP4+ any time soon
All in all, these Ilford films are nice. Brighter whites than Tri-X, but overall not as pleasing to me as Tri-X. Delta 100 is more to my liking, though I wish it was a little more contrasty. Maybe I can agitate it more than 1x per minute, or use a stronger dilution of HC110?