I'm currently using a Pany 20mm/1.7 along with a wide-angle adapter: It's a Raynox 37mm 0.66x adapter that effectively brings my collective glass from a 20mm down to a 13mm. However, you can see from the example shot below that it doesn't really handle the edges very well: Anything outside of the center of the lens is out of focus. Now I've actually grown to enjoy and even prefer this effect but I know that this is merely a "hack" and not the optimal arrangement for my plastic-framed 20mm... So, out of just shear lack of reasonably priced wide-angle glass in the u43 world, maybe I need to go out into another lens ecosystem and find something to adapt? Maybe a vintage 24mm Canon or something like that would get me the same result without blurring the surrounding portions of a shot? I've managed to find vintage Canon 24mm/2.0 but am I missing something? I just don't want to pay $800 for the Oly 12mm/2.0 but I may just not have an option. Autofocus is a nice feature to have... Your thoughts??