This may have been discussed before, but I have bought some 400 Rollei I/R b/w film to try. My last experience years ago was with some Kodak product. What do you suggest I rate the film for exposure given that I will be using an I/R filter (an IR 76). Any advice will be appreciated.
I've been using this film with an Heliopan RG 715 filter. With this filter (light under 715 nanometer will be blocked) I get excellent results.
Very good Wood effect with clear white leaves.
For IR exposure series are recommended, because the IR intensity varies during the day.
The best Wood effect you get if you have an angle of 90° from your shooting axis to the sun.
In that case and with the 715 filter I expose the Rollei IR (you can also use the much cheaper Retro 400S and Superpan 200 and get absolutely identical results) at ISO 5 - 6.
These films can also be developed as slide films in the Agfa Scala process with outstanding results (some labs in Europe offer that service, I can recommend Photostudio 13).
BW IR as slide on a lighttable or projected on a screen is breathtaking and looks much much more impressive and brillant than IR as a normal print.
The Wood effect really shines in a BW slide.
Cheers, Jan
P.S. Just forgotten: As you are located in downunder, afaik the "lighthouse lab" in Australia offers the Scala process, too