Recently just got my EOS 40D modded for IR by non other than fatigue. When comparing to without using any filter on the lens & camera on AV mode :
Tried CP with it (though internet say no effect, but what the heck, have it use it lor):
No cutting of reflection in windows
Needs to compensate 1/3stop less.
But when I tried 25A:
Color didnt shift
Needs to reduce 2stops exposure compensation
Any idea y so much difference in the metering?