Unfortunately disturbing is the somewhat stiff and not easily accessible aperture ring because the subject search you have with an open aperture and then you have the desired aperture before triggering set manually. This is of course only for landscapes, that on a snapshot object waits certainly not until you have changed the lens again ;-)
Basically, I recommend this lens all amateur photographers and if you GH1 adjusts the image size in the Panasonic to full size, then you also get 180 ° angle of the image. If less than the full resolution image while the viewfinder shows the GH1 180 ° images, but the images are cropped to about 160 degrees !!! Apart from the manual aperture adjusted, this FishEye is a very good lens and recommended for effects shots or wide landscapes.
Enclosed 2 compared photos. The added 1 photo to the walimeXpro Fisheye 7.5mm medium image resolution and the second photo with the aspherical Panasonic 7-14mm wide angle with 114 ° angle of view, however, that had cost so much about times 4.