The key to obtaining ideal photographs depends on the exposure triangle of photography. The exposure triangle consists of aperture, shutter speed, and ISO. The combination of the three determines how dark or bright the resulting photo will be.
Aperture is the opening in the lens where light enters. If the opening is large, ample lighting will enter the lens. As the opening gets smaller, less light will enter. Besides being one of the ways to control incoming light, aperture is also used to control the depth of field.
In practice, if you are in an environment where the light is very bright, then the lens opening can be narrowed so as to lessen the amount of the light that enters. If the environment is a low light environment, then a larger opening is necessary for enough light to enter to obtain an optimal photograph. Read the rest of this entry » .
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