<p>The Olympus E-M1 is the only current (m4/3) camera that will AF well with the Zuiko 150mm f/2. Unfortunately, this is still a rather costly camera, and you probably have to fork out $7-800 even for a used one. Then you do get a stellar camera, and with the legendary 150mm, you are all set for some great photography.</p>
<p>As has been mentioned earlier on this thread, the lens will work great on an E-3 or E-5. The E-3 represents rather old sensor technology, but is fine in good light. The E-5 floats around the same price as the E-M1 second hand, and the E-M1 is a much better camera.</p>