What's the Fastest Lens Theoretically Possible? And What Would it Look Like?

We’ve told you about some pretty fast lenses in the past — from the legendary Zeiss 50mm f/0.7 lenses made for NASA and used by Stanley Kubrick to film a candle light scene, to X-Ray lenses that you can try to Frankenstein onto your camera body for some strange soft-focus results. But what is the […]