adapter
This is an interesting thread in that I often wondered if the expensive adapters made by Voigtlander and Novoflex were made to higher tolerances and justified their higher price. I ran a test with a Nikon 105 mm Nikon and at infinity with the Voigtlander, the "infinity" image of a neighbors roof was in focus. But with my old Nikon F adapter, purchased from eBay, a year ago, setting the lens to the infinity mark did not work. As several people wrote, you have to focus just short of the infinity mark with the less expensive adapter.
As an aside, I had used the eBay adapter with my G1 and GH1 and it seemed fine. But now with my G2, it seems somewhat finicky. It will occasionally cause the camera to give rise to the message that the lens not securely mounted or it gives a black screen. With a little jiggling, it gives an image and is workable. An annoying "feature". I wonder if my G2 is just a little bit more touchy about adapters than my G1. Anyone else observe this?
Brian