Can someone explain Aperture Value on a digital camera for me? (in words i can understand)?
I have a Canon Rebel
The aperture is basically the hole in the lens which lets light in.
The smaller the number (f2.8) the larger the hole therefore more light
The larger the number (f22) the smaller the hole – less light.
There is a relationship between aperture and depth of field (the amount of sharp focus basically).
That is the smaller the number the smaller the area of focus.
For instance if you want a portrait with the subject in focus and the background blurred you would use a small aperture number.(f2.8)
if you want as much in focus as possible then use a large aperture number.(f22).
The other relationship is between aperture and shutter speed.
If you need a fast shutter speed then you will need to use a large aperture (small f number)
For instance if you want to freeze motion then you would need a fast shutter speed and probably need a large aperture to get the proper exposure.
i.e. for the exposure to be right you could use
f11 @ 1/30
to get a faster shutter speed setting of 1/125 you would need to have a aperture of f5.6.
That would give the same overall exposure but would help with freezing motion a bit more.
Hope that was not to complicated.
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