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Discussion: What is Aperture?Reported This is a featured thread

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scrappingsimply
What is Aperture?
Apr 11 2009, 2:21 AM EDT | Post edited: Apr 11 2009, 2:21 AM EDT
Aperture like shutter speed and ISO is a light control and is tied to them in picture taking.
For any given shutter speed and ISO there is only one correct aperture for a given effect.

More critical use of aperture is done when we worry about depth of field

Depth of field is the distance in front of and behind you subject which is still sharp
1/3 of the depth of field is in front of your focusing point 2/3 of your depth of field falls
behind your focusing point.

Smaller numbers represent a larger opening which lets in more light and will give you
faster shutter speeds. Larger numbers are a smaller hole thus you get slower shutter
speeds. Smaller numbers give you a smaller depth of field. Larger numbers give you a
larger depth of field.

Portraiture is typically done using a small aperture setting to blur the background

The closer you get to the subject the easier it is to blur the background. And the harder it
is to get the background clear.

If your subject is on a flat plane (wall behind subject) you will have a hard time bluring
the background

Smaller cameras have an easier time making the background clear, but a harder time
blurring the background. (hint: Get close)

Aperture can be used to control shutter speed, and can also be used to create star filter
effects at night.


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scrappingsimply
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Apr 11 2009, 2:22 AM EDT | Post edited: Apr 11 2009, 2:22 AM EDT
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scrappingsimply
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Apr 11 2009, 2:24 AM EDT | Post edited: Apr 11 2009, 2:24 AM EDT
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