I've got the Fuji TX-1 (the everywhere else's Xpan). Mine is the original version, not the Mk II version. I have shot infrared with it with no problems - it is actually a great format for infrared film. While the camera does use an IR sensor to count frames, this only creates very minor fogging between the sprocket-holes and does not intrude into the image area in any way. I only have the 45mm lens for it, and have been extremely happy with that 99% of the time. The only times I have wished for either the 30 or the 90, I found myself wishing even more for perspective control, which is not available with the Xpan in any configuration.