I bought an unused Olympus M.Zuiko Digital ED 40-150mm f/4.0-5.6 just few days ago. When buying that I attached the lens to my E-M1 to take sample photos and everything was fine. Now when I had the place to use it, the lens refused to work. The Oly E-M1 shows that the lens would in manual focus mode, but no focusing can be done and the camera doesn't respond to anything. When I replace my 12-40/2.8 Pro to the body everything works fine again. Could I have some setting wrong in my camera or is there a contact pin problem with the lens (it is of much cheaper quality)? Any ideas I could/should check before sending that to Oly service?