Bought used in 'like new' condition. I use it on a Panasonic GX85 Micro 4 3 camera body via a Kipon autofocus adapter that allows Canon EF lenses to be used. The adapter supports full EXIF data. This lens focuses quickly and accurately with an adapter. I also have a Sigma 30mm f/1.4 ART lens which I also adapt to MFT with a Kipon adapter and the Canon lens focuses much faster than the Sigma which is a bit slow and sometimes has trouble in low light. Canon focuses well (even better than my Olympus 17mm f1.8 and Olympus 25mm f1.8) in low light. IS works very well and it works in conjunction with my GX85's 5-axis IBIS. Basically, it's like using Panasonic's OIS lens, which offers dual stabilization. With the MFT you have the equivalent of 48mm f/2.8 FF, which is very close to the classic "normal" 50mm focal length. Using the Kipon Baveyes x0.71 Focal Reducer / Auto Adapter gives you the equivalent of a 34mm f/2.0 FF, which is very close to the focal length of a classic 35mm FF. In good light, the lens is very sharp even with the aperture wide open. In low light, IS really helps to get sharp photos with static stills. However, since the lens can shoot at a maximum aperture of f2.8, subject movement can become an issue in very low light. If you're using a focal reducer adapter, a maximum aperture of f2.0 helps somewhat. In general, I am very satisfied with the lens. I'm only giving it 4 stars because it struggles a bit with subject movement in low light due to its f2.8 maximum aperture. It would be a low light beast if they did it at f1.4 or at least f1.8.