Early days with this lens quite a learning curve going from 12mm max with previous lenses to 8mm, I use it on my Olympus cameras, the build quality seems good and design is very neat, for me it is a pity that the zoom ring is a smaller diameter than the manual focus ring but that will be easy to overcome. I like the fact that you can use screw-in filters with the lens and the lens does not extend or rotate when zooming. Quality of images appears to be very good but would be interesting to compare with the new Olympus 8-25mm lens. All in all a very nice neatly designed lens which I am looking forward to use to expand my photography into the wider world.