Originally posted by JinDesu One question though - when manual focusing, are you specifically using the image in the focusing screen/viewfinder to confirm? Or do you also use the little green hexagon?
Originally posted by vodanh1982 Another question, can the green hexagon be used for MF lenses? I thought those lenses have no electrical contact.
Yes, you can, but it will never guarantee is 100% in focus.
There is a "sort-of a play" when the software will tell you that it thinks the object is in focus.
The whole point of switching your focus screen to a better one (like split screen for example) is to help you to accurately focus your subject, eliminating the "is sort-of in focus" green box warning ... but in that case you have to adjust for the thickness of the new screen - and that can be done only by using a different shim.
Which one!? It all depends on the thickness of the shim - so you have to experiment.