This 360-degree lens attaches to your iPhone camera
https://www.theverge.com/circuitbreaker/2017/11/16/16666472/360-degree-lens-iphone-camera-photos-videos
There’s a new 360-degree lens you can attach to your iPhone to record photos and videos. The Fishball lens clips on with what the company calls a secure locking mechanism, and its system of fisheye lenses and mirrors let you shoot 360 degrees using the Fishball mobile app.
There’s already a lens attachment called the Insta360 Nano, which turns your iPhone into a 360-degree camera, but the difference is that it costs $199 and has a considerable number of additional parts, including a card slot, internal microphone, LED indicator, and a shutter. Fishball, meanwhile, currently costs $39 on Indiegogo for early adopters, and its retail price will be $99. There’s also a lens called Sphere that turns your DSLR into a 360-degree camera, according to PetaPixel.