I use it to the video on a pro grafted GH2. Users of μ4 / 3 know that the choice is restricted by UWA in this format but it keeps its promises 7-14. It is certainly not cheap, but the image is superb and contrasting stitched to perfection. The constant opening is a big plus and the focus gadget if not rank it. The deformation is inevitably somewhat feel 7mm but the image remains vivid. I feared a little opening to f / 4, but nothing negative to report. Concerning the context, this type of lens is not in a nearly and ask you to seek rigor, although the appropriate composition is rather part of the fun. I have not used much in the picture but clichés are successful. By cons, riding a GH2, the flash produces a big shadow by tapping the sun visor! The beast detail! Ultimately, if you are looking for ultra wide angle lens is for you. For me, it usually leaves the housing.
