I've got a Canon 350D with the internal IR filter removed (for astronomical use). One of the side-effects of that, is that autofocus doesn't work anymore, because of the removed glass from the optical path. Some people replace the IR filter with other clear glass to retain autofocus. I didn't.
I wonder if there's any way of adding an "autofocus offset" with a CHDK script. Something like
I have never written a CHDK script in my life and I'm kind of lost.