I always remove lens and TC as a single unit. Much easier to hit the camera lens release button with one hand than it is to fiddle with the little slider on the TC.
I agree with this, but you are missing my point.
You have a lens on the camera right now. You then decide that you want to use that lens with a TC (the TC is not yet on that lens). Do you take the lens off the camer, then put the teleconverter on the lens, then put the teleconverter+ lens combination on the camera.
Or
Do you remove the lens, put the teleconverter on the camera, then put the lens on the camera+TC combination.
Same number of moves, but in the second scenario the camera body is open to dust (and crud) for a shorter (for some it may not much shorter, but shorter) time. Plus in this second manner, (for me) I can actually do the action much faster than the first method.
Unfortunately the second method is not the order Canon says in their directions. But they also don't say it MUST be done the way described in their directions (the first way here), nor warn against doing it in an order other than the directions. Hence the thread!
