OK, This has probably been discussed recently, but can anyone out there recommend a good formula/rule of thumb for adjusting exposure for reciprocity in Ilford films? The technical data on their webpage is merely a chart, and I am hoping to get more specific information, based on the experience of the other pinhole photographers on the list.
I normally use Delta 400, but occasionally use HP5 and Delta 100. I process in Ilfotec DDX (although I also occasionally use Ilfosol). Anyone out there with experience with these films? My camera is the Zero Image multiformat (which is at f235). Thanks! M Billingslea
