Fast Lens
A fast lens means having a larger iris (and smaller
F-stop).
A fast lens gathers and transmits increased light to a security camera. The greater the available light the easier it is for the security camera to be able to get a good, clear and color image. It takes 1.5 times more light to make a color image than it does to create a black and white image.
See F-stop for more details.
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