c4precisionoptics

This Widest-Ever 4.9mm Fisheye Lens Can See Behind Itself

LensRentals founder Roger Cicala is known for disassembling camera gear and sharing his findings on his company blog. Now he has done the opposite: he's sharing how he built (from scratch) a prototype 4.9mm f/3.5 "hyperfisheye" lens, the widest fisheye lens ever made. It's a lens so wide that it can literally see behind itself.