1,140 Canon 400mm f/2.8 Lenses Will Search Space for Dark Matter
The world's largest all-lens telescope, MOTHRA (Massive Optical Telephoto Hyperspectral Robotic Array), is under construction in Chile and features 1,140 Canon EF 400mm f/2.8L IS telephoto lenses arranged in groups of 38 lenses across 30 different mounts.