HIE seems to be a fast emulsion (horrendous grain)
..excellent for Lith printing though..
Originally Posted by Ole
BTW the Rollei IR 820/400 works fine with a 695 IR filter, and is fast enough with that to allow hand-held shooting. I tried it in a Bessa-L with 21mm Color-Skopar and a Heliopan filter; setting the speed dial to 200 gave good results measuring through the filter. It ended up at something like EI 20.
..interesting: to get a decent IR effect I had to use a 89c filter, at 8 asa..