Fits perfectly on my 14-42mm lens for em-5. Great addition to the bag for lens protection.

Got this lens for my Pen Mini, makes for a compact package but if I could have tried it out first I most likely wouldn't have got it. I just don't like the electric zoom. Trust me the eye and hand are a lot faster and accurate than a Electric motor. If a small size is not a issue, then you should go with the standard lens in this focal length. A lot easier to use and costs a lot less.