The image quality isn’t great – in particular, the flare is horrible – but it’s so light that it’s worth having just because you’ll never grudge carrying it. You always take better pictures with the lens you’re actually carrying than the one you left at home.

Anyway, here’s some sample shots if you’re curious.

Edit:PS. I forgot to mention, the lens only costs $15. Seriously cheap for what you get.

A single fisheye shot actually produces not a bad result on its own; this example is another shot taken in Ronda but with just a single image imported into Hugin. However, I found that if you’re stitching at all, you need to use at least three or four shots or Hugin will not have enough information to figure out the appropriate orientation for the second shot. That causes you to end up with a really messed up stitched output. If you know for sure that your horizons are straight, you can probably get around that by restricting it so that it can’t change the image roll, but I can’t see it being a reliable way to get decent output.

Below are some of the source images for anyone who’s curious.