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Originally Posted by SteveR
Please explain what the f/ stop numbers on my camera lenses mean. It's confusing the hell out of me.
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since my brother cant answer this one, i will. the f-stop determines how far open the lens is and thus the amount of light that the lens lets through at any time. It also determines depth of field (how much is in focus). at f2.8 (or the lowest number your lens goes down to, whether it be 1.8, 2.0, 2.8, 3.something, whatever) the lens is all the way open, letting in the most light, which gives you the quickest shutter speed, but it also gives you the least depth of field, which means that only one certain point will be in focus but not the rest of the picture, which is then gradually blurred.
at higher f/stops like f11 or f16, the lens lets in the least amount of light, but makes you have more depth of field, meaning almost everything will be in focus.
lower f/stops are used in lower light, where you need a faster shutter speed to get a picture w/o shutter shake or if you want a short depth of field. higher f-stops are used in bright light, for more in focus. The numbers double and have the half stop there as well, (2.0, 4, 8, 16 with 2.8, 6, and 11 in between) I can go into more detail, PM me for more info. I think i've bored everybody enough here.
Now for my question to Al... how are we twins if we share no DNA?