This rare lens was offered for sale at £100,000 *and sold* recently. The vendors took a video before selling it – which shows that with a 220˚ field of view, the lens can actually capture light from behind the camera body.

It’s also probably the least practical lens ever made, you’d need sherpas to cart it around with you.

6mm f/2.8 Fisheye-Nikkor on a Nikon D800 – First Time Ever? | Grays of Westminster.