1. Nikon 6mm Fisheye Lens
Upon it’s release the Nikon 6mm f-2.8 was the widest lens in the world. It boasts a 220 degree angle of view and is no longer in production. However, If you’re lucky, you might find one pop-up on eBay every now and then.
2. Carl Zeiss 50mm Planar f/0.7
This lens was actually created by NASA to shoot the dark side of the moon. Stanley Kubrick used these lenses to shoot the candlelight scene in Barry Lyndon. You can even rent these same lenses today via the Kubrick Collection.
Price: $23.1 million, adjusted to inflation