UCLA Develops World's Fastest Camera To Hunt Down Cancer In Real Time

The lens and F stop have nothing to do with speed, the shutter does.

Nah there are fast lenses and slow lenses. At least that's what they called them in the 90s. A fast lens can run a faster shutter speed usually because its bigger but also "insert optical magic here".

Just like you can have two telescopes with identical focus and identical field of view but the one with twice the lens surface area has a shutter speed twice as fast, because it shovels in twice as many photons per second.

Think how easy it is to make a zoom lens for sunlit outdoor work, but how hard it is to pull off a long distance candle-lit shot... you can do it with a fast lens that basically resembles a large aperture telescope, or theres some heavy optical weirdness with trading off the depth of field for light strength or something.

I know just enough optics to be really dangerous. Mostly because I know microwave RF optics better than I know visual optics.

Here I found the lens speed article on wikipedia:

http://en.wikipedia.org/wiki/Lens_speed [wikipedia.org]

Source: http://rss.slashdot.org/~r/Slashdot/slashdotScience/~3/_BnoBwt_NOI/ucla-develops-worlds-fastest-camera-to-hunt-down-cancer-in-real-time

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