I just bought an olympus OM-D EM 5, bought a 70-300mm Zuiko lens, and just realized I'm missing the glue... an adapter (for m Zuiko 4/3). I am trying to research these adapters, and these things are confusing for one, and two, the ones I have found are not cheap (over $100). What do you recommend? Where can I find a good deal on one? Thanks!
Essentially there are three adapters. The original adapter, badged as the Panasonic DMW-MA1 and Olympus MMF-1, which has full coupling, the lighter & cheaper MMF-2 which is identical to the MA1/MMF-1 aside from build & weight and the new Olympus MMF-3 which adds weather sealing when paired with the OM-D (or a Panasonic GH3) and an HG or SHG grade 4/3rds lens. Beware the confusingly named MF-2 adapter, it is for OM lenses unlike the very similarly named MMF-2.
If you ever intend to own an HG or SHG lens, get the MMF-3, otherwise get the MMF-2 or MA1 (the MMF-1 is usually more expensive despite being a rebadged MA1).
Note that you are getting a functionally manual focus lens out of the deal. The 70-300 is dog slow for AF on a 4/3rds camera, it's glacial on a Panasonic G1 (which has faster AF with supported 4/3rds lenses than the OM-D). I've not used it on the OM-D, but the second 40-150 I've used on both G1 and OM-D, it's a much faster focusing lens than the 70-300 even on an E-30 and it's almost unbearable on the OM-D.
