Aperture - F/stops ... The amount of light let into the camera
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- The aperture is a hole in the lens formed by a series of metal blades. These close down when the shutter release is tripped.
- The size of the hole is known as an f/number or f/stop
DARK SCENE ... Use a large aperture
- The aperture helps to determine how much of the picture comes out sharply focused and how much does not.
- The zone of sharp focus is called the 'depth of field' and it is important to know how to control this.
- The higher the f/stop, the greater the depth of field - eg: the higher the f/stop the smaller the hole.
For greater depth of field - close-up and background in focus ... landscapes
Use a small aperture - i.e. f/16
Much more of the scene will come out sharp
f/22 = small aperture = great depth of field
f/5.6 = medium aperture = focus on subject with small depth of field
For shallow depth of field - close-up and background blurred ... portraits
Use a large aperture - i.e. f/2
The background will be out of focus
f/1.8 = large aperture = subject focused