Big boo boo you are right it is Rollei not Foma. I have been using Foma 400 a lot and printing it using foma paper. I have not had a drink I think I need to drink more won't make so may mistakes
Ok! the procedure is to meter the scene then subtract six stops, put the filter on and make the picture. or is that to simple.
I've used Rollie retro I found it to be a very smooth grain wise with a good level of contrast.