Disclaimer: I'm not associated with MetaBones in any way. Not that I wouldn't mind if they're interested... anyway... Some of you may have heard of the MetaBones SpeedBooster focal reducer adapter. Short story of the concept, it makes use of the "dead space" in SLR-to-mirrorless lens adapters to add focal reduction optics that lead to a ~0.7x focal length reduction and a ~1-stop speed increase - rather like an inverse teleconverter. In other words, an inexpensive 50/2 suddenly effectively becomes a ~35/1.4. Reviews of these adapters with NEX cameras has been generally positive. Anyway, at long last, the MFT-Leica R and MFT-C/Y Speedbooster adapters are now available. Micro 4/3 System : Leica R Lens to Micro Four Thirds Speed Booster With a nice set of R primes, I'll be ordering one after a few more invoices are received this month. Word is that many other adapters are planned, notably including Nikon, OM, and a fully electronic Canon EF version.