Yesterday I took delivery of a refurbished Olympus 9-18 f/4-5.6 lens. When I put it on my E-M10 all I got was a blank screen. Tried it on my GM1 which returned a 'Lens Attach Fail' error. Several attempts on both cameras yielded the same results - so back to Olympus it goes. It's pretty disappointing. I expect a refurbished lens to be verified for proper operation prior to shipping. Apparently this one was simply repckaged and sent out.