The 28mm lens was very important to me, back in the day of 35mm. I've had them in Contax G, Canon FD, Olympus and Ricoh. Yet it seems hard to translate that into modern digital APC or micro 4-thirds format. Canon (EOS M), Olympus, Samsung and Zeis are so far no-shows at the moment, in producing full-frame 28mm prime equivalents. That leaves the Fuji 18mm F2.0 and the Panasonic 14mm F2.5. Both are compact and "cute". And there in is maybe the problem. It may not be possible to be petite, fairly fast and outstanding optically (critically sharp to the edges by F5.6/F8.0) at the same time. The Fuji 18mm F2.0 gets tepid reviews from slrgear.com, photozone.de and in many user reviews. Fuji's own MTF curves seems to invite one to get the 18-55mm or the 16-50mm zooms instead, if one wants sharp 18mm results. In fact, I'd like to ask here--does the Fuji 16-50mm zoom provide their best 18mm? The Panasonic 14mm F2.5 enjoys a better reputation--as befits a more conservatively designed lens (slower maximum aperture/smaller image circle). But even it seems exceeded by the latest Panny/Olympus zooms. Obviously, Fuji and Panosonic can design and manufacture outstanding glass--witness the Fuji 14mm F2.8 for example. But my major expectation, years ago when mirrorless first came on the scene, was uniform excellence from the normal on down, due to ditching the mirror. It's a surprise not to get it. There is still Sony--they have just announced a new 28mm F2.0 full frame lens for the Sony A full fame mirrorless line, with a VERY interesting twist of offering adjunct adpaters to convert the 28mm to either a 21mm full frame lens or a wider still fisheye. Regrettably, no further word on it's expected performance/MTF curves, weight or even filter thread.