Joe Skinner

You talk about using a tokina 11-16. I was looking into getting a GH2/3 and was going to get this lens. But lots of adaptors say they only deal with focal lengths of above say 25mm; mind these are the cheap ones. Was just wondering what the difference between cheap adapters and expensive ones our apart from build quality and apature control. How can they use wide angle lenses when some of the cheap ones can't??? Thanks