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What is Hyperfocal Distance?

The Basics:

Hyperfocal Distance refers to the specific point after which everything will be in focus. The precise distance is calculated by using a formula, taking in to consideration things like aperture and focal length.

A Little More Detail:

The point of Hyperfocal Distance is to be able to capture an image with a depth of field just deep enough to make sure everything is in focus, while using an aperture that isn’t so small as to introduce unwanted artifacts like diffraction. It was commonly used in landscape photography in the film days. In the digital era, it still has application, but is not used so much.