When I was a kid my dad had an Olympus OM10, he had a bunch of lenses for it and I remember focusing was done with a special circle in the middle of the viewfinder, where you pointed it at the thing you wanted in focus and made the two half of the circle join up and focus was done.
These days I have an 1100D and my dad has a 400D, we both want to experiment with the lenses from the old Olympus. So I've ordered an adapter ring with an AF Confirm chip.
Because I don't reckon I could get anything in focus without that magic circle in the viewfinder, I'm hoping that AF confirm will help me. My understanding is it allows the camera to "tell me" when I'm in focus.
But how does it tell me? and do I have to enable some settings or be in a special mode for that to work?