How to Choose a Lens Aperture (F Stop)

One of the most important settings on any adjustable camera is the size of the hole (known as the "aperture") through which light passes on its way from the subject, through the lens, to the film. The size setting of this hole, customarily referred to as the "f/stop" in reference to a standard measurement or simply the "aperture", determines depth of field, manages the effect of certain lens imperfections, and can add certain special effects such as spiked "sunstars" around bright highlights. Here's how to choose the best one.

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