Property me a few months ago this lens for my GH2 ordered in order to make on a Steadicam system filming. The result can really be seen. The camera floats through space and thanks to the very low focal length this happens even quieter and more plastic. In the absence of people (in detail) are in the picture, the lens corrects very well and all the edges at the edge remain without curvature. Only faces can be seen then unpleasant distortion - but with such a focal length can be physically expect anything better. What bothers me about the lens still (but there are also unfortunately nothing better for MFT) is the maximum aperture of f4.0. Should go more for such a price. When I think of my 5D Mark 2 - there are 300 of Samyang for a 14mm f2.8 Kracher. At full size, without the rough crop factor of the GH2 the same image circle. Image quality absolutely identical, but just much light sensitive. Unfortunately the 5D Mark 2 is inferior stuff video performance far in terms of detail resolution of the GH2. Therefore, this lens for super wide-angle and video is still unavoidable. But should hopefully change with the coming 5D Mark 3. Then you get super wide angle substantially light-sensitive for 300 euros.