From my experience, I think this film is close to an E.I. of 25. From the looks of the scans I have done I also think the film needs more development than normal. I haven't printed anything yet though. The first roll I shot was at 50 and it was not good... The second was at 25 and looks decent. No filters. I developed the two rolls I have shot so far in Edwal 10, 6m, 77. I stuck another roll in a camera and will be exposing it at 12 just to see it. So far I think it is ok. I like the higher tones I am getting with it but the shadows are a bit of a mess... Very heavy.