Interviewees reminisce on how Stanley Kubrick acquired the Mitchell BNC cameras and used them, in conjunction with NASA Zeiss lenses, to film “Barry Lyndon” using natural light.

Kubrick used three NASA-built 50mm f0.7 aperture lens so he could shoot literally by candlelight. f0.7! That’s two full stops faster than any lens you can get today.

via Barry Lyndon: Use of the Mitchell BNC Camera and Zeiss Lenses – YouTube.