Here are my pedestrian notes:
The Aperture is inversely proportional to the f-stop and also inversely proportional to the depth of field
ie, A wide aperture opening lets more light in to the shot, it means a low f-stop number, and a shallow depth of field(background blurry). (so, I guess this is good for macro shots eh?)
A small aperture opening means less light in the shot, a higher f-stop number, and a large depth of field (everything in focus).
and here are the pics I took as practice to better understand the concept
This pic was taken with f-5.6 (see the blurry carpet??)
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This pic was taken with f-36
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