Warning: there are also more expensive adapters that have an AF-chip, often referred to as semi-automatic adapter. This emulates the signals that normally sends a more modern lens to the camera. These adapters are chipped condition for the AF confirmation funkioniert, ie button pressed halfway, the AF point lights up when is sharp Manual focus area of the AF point.
The adapter described here without chip can not do, that you will only use the viewfinder focus (in modern DSLR that do not have split-image rangefinder, makes it not fun and is not exactly possible), or if the camera has, over the LifeView. LV + Lupe allow precise focusing.
LV without a tripod, that is, with hand-held camera, and then turn the focus ring yet in my opinion is impractical.
OT: I have the OM 50mm / 1.8 to buy the two kit lenses of my E-520, which provides together with the adapter so well that I think about buying a AF-chip adapter.
