Originally Posted by not spavin
How the frig does that work?
And 45 point AF?! My D2X only has 11.
I had it on another Canon too, To calibrate it will illuminate a number of AF points whilst you hold the camera horizontally, then vertically, you look at each in turn and click.
Then whenever you look through the viewfinder the camera can determine which part of the scene your eye is looking at.
I read that they couldn't make it work with digtal sensors, but don't know why.