I dare say you are going to have to run your own tests to find the right time. I have found my processing times for XTOL can vary wildly from what developing tables have reccomended (I'm speaking particularly of Kodak's). At other times they are right on. I too use XTOL 1:1 as my standard developer, in a Jobo processor. I carefully metered some SFX @ 200 and found that a developing time of about nine minutes was about right. I also have a client who loves to shoot this film. He does use a red filter, (which I did not use in my test). The highlight detail in his film when developed at nine minutes is extremely dense. I do believe he is metering accurately. So I need to do more testing on my own with a red filter. Very interesting. I was wondering if anybody else has noticed density differences with this film when used with or without a red filter?(posted 8465 days ago)