Even more so than the Canon EOS and Four Thirds lens mounts, Micro Four Thirds with it's short flange distance and constant live view opened up all sorts of possibilities to use adapted lenses. At first this was a necessity due to the limited lens line-up, but the gaps are slowly but surely being filled. The most popular type of adapted lens would appear to be the classic "fast fifty"; fifty-something millimetre lenses with a maximum aperture of at least f/2. This is as much as for their usefulness as a portrait or short-telephoto lens as it is for their price and availability. Now that Olympus has announced the M Zuiko 45/1.8, I'm wondering if the older legacy lenses will start to lose some of their appeal. The price of the Zuiko is reasonable at ~$400, although I say that with reservations when comparing it to the cost of a full-frame Canon 50mm f1.8 II as an example. How many would give up their old fast fifties plus an extra few hundred dollars for this new lens?