I recently used one in the Maldives. This lens' raison d'etre? Speed. Here is a shot, taken just after sunset, wide open (f/1.8) at ISO 1600. The Olympus 8mm allowed me to keep a shutter speed of 1/160 sec to stop the action. It would not have been possible with the Panasonic fisheye without raising the ISO by 2 stops, to 6400, which would result in too much noise, or by lowering shutter speed to 1/40 sec, which would result in motion blur.
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