What this guy said is true


送交者: cornbug 于 2018-01-03, 19:55:11:

回答: Metalens 由 silxirt 于 2018-01-03, 19:38:41:

"Lenses didn't get smaller because physics says it's impossible, if you want to catch a certain amount of light you have to use a lens with a certaint size, no matter the type of lens.
Future "lenses" might get much lighter and thinner, but surely not smaller in area, you can't break physics ;)"

That is why the larger the diameter of a camera lens is, the higher speed you can use for the same ISO of image sensor.



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