... It seems we need a forum about lenses which are made for M4/3, but are neither Pana nor Olympus! Samyang Lenses for Four Thirds, <a href="http://www.photographyblog.com/news/samyang_lenses_for_four_thirds/">here</a>. Update: oops, it's 4/3, not M4/3! (Me, I was never very interested in 4/3, but very much in M4/3.) ... and since they also work on DSLRs APS-C, they won't be very compact. Too bad.