I bought my OM-D just after the new year expecting to use the four thirds lenses that already had. Both the 14-54 mkII and the 50 mm f2 macro are great lenses but slow focusing; the macro especially so. Even before buying the camera, I'd been leaning toward the Panasonic lens. But I've heard that it too is slow to focus. Anyone out there with experience with this lens on the OM-D? I would appreciate any thoughts and observations!