I'm looking for a bright zoom lens for the E-PL2. Since there's no such lens on native lens, I believe I have to go for adapted lens. What is your suggestion on a zoom lens (around 50-200) with f2.8-3.5 or similar. I know there is one Olympus lens like this. Will this work ? What other options are ? It's fundamental that AF and IBIS work with this adapted lens. Will I loose any aperture of the lens or it mantains the aperture on the mft body ? Thanks for any suggestion.