Olympus M.Zuiko ED 12-50mm Compatibility

It's almost 3x the weight of the 14-42 (211 vs 91 grams), so that alone would probably eliminate it from usability. It is also much wider (uses 52mm filters!) so I have my doubts it would actually even fit on the X5. The Panny 14-42 isn't much bigger than the Olympus and that one doesn't fit the X5.