As this is such a specialist lens, it's highly unlikely that you'll be strapping it to the front of your camera every day. The 8mm is designed for specific occasions, purposes and looks.
That said, the look it achieves is really quite something — all bulging lines and distorted perspectives. Images are pretty sharp from corner to corner and colour rendition from the lens is also good. Autofocus is quick, responsive and nearly silent. Images produced with the lens cover the entirety of the frame, with no black circle that some fish-eye configurations produce.
Video in particular is a spectacular way to showcase what this lens is capable of, which you can see in the short clip below.
Click each image for full-sized samples from the 8mm lens. Images were taken on the. No post-processing has been done to alter these photos.
Given the limited applications for a fish-eye lens and the expensive list price, we can't help but wonder how many of these units Panasonic will sell. If you want to shoot real fish-eye and Micro Four Thirds is your system of choice, the 8mm is the best (but most expensive) option.