I just got a 18-105 VR from a D90 owner who didn't need it. I also recently acquired a D80 Deep-IR converted by lifepixel and calibrated for the 18-70AFS. I've just had the lens for a few hours now but walking around the outside of my office building (streets, lots of trees, signs, grassy graveyard, etc), the IR focus seems to be spot on with the 18-70 calibration. Perhaps it would be spot on without any modification but I can't say for sure since mine is. I also have a katzeye split image focusing screen installed and its also focussed according to that as well even though it should be offset by a little. Anyway, everything is working for me so I'm happy.