Originally posted by leekil The first B&W roll you run through your Pentax SFX should be Ilford SFX.
Haha....I hope the OP doesnʻt take this suggestion seriously. Using true B&W infrared film is very difficult because it needed to be kept in cold storage, didnʻt really have an ISO or EI rating, but I would use it around ISO 12....but with an R72 IR filter, you lose at least another 5+ EVs.
I havenʻt tried the Rollei infrared B&W film, but when Ilford SFX came out with an ISO 200 rating and not needing cold storage handling, I had high expectations. Yes, it sort of works and sort of replicates b&w infrared, but I never got it at the same ethereal quality as traditional IR.
Anyone try both the Ilford SFX and Rollei Infrared 400 and can compare and comment?