Why small means big

NPhoto - - Nikopedia -

■ If you have trou­ble re­mem­ber­ing that smaller f/num­bers in­di­cate larger aper­tures, you can think of it in terms of frac­tions: so 1/2.8 is about a third, whereas 1/22 is ob­vi­ously even smaller than a twen­ti­eth, so much smaller.

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