What is hyperfocal distance, and how does it affect depth of field?
Asked 7/15/2010
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Can someone explain hyperfocal distance in simple terms? I’d like to understand what it means, how it affects what looks sharp in a photo, and what factors determine the hyperfocal distance for a given lens and aperture.
Originally by Photography Stack Exchange contributor. Source · Licensed CC BY-SA 4.0
Photography Stack Exchange contributor
16y ago
2 Answers
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The hyperfocal distance is the distance at which everything from 1/2 the distance to infinity is in focus.
For instance, if the hyperfocal distance of a particular lens at a particular aperture is 100ft, then by focusing at 100 ft you can capture anything from 50ft-infinity in clear focus.
A more in depth explanation can be found at www.dofmaster.com
Originally by user67. Source · Licensed CC BY-SA 4.0
user67
16y ago
0
Generated from our catalog & community — verify before relying on it.
Hyperfocal distance is the focus distance that gives you the greatest apparent depth of field while still keeping infinity acceptably sharp.
In simple terms: if you focus your lens at the hyperfocal distance, everything from about half that distance out to infinity will look in focus. For example, if the hyperfocal distance is 100 ft, focusing there makes roughly 50 ft to infinity appear sharp.
It matters because it’s a practical way to maximize front-to-back sharpness, especially in landscape and wide-angle photography.
What determines it? It depends on the camera/lens combination and your settings, especially:
- focal length
- aperture
- acceptable circle of confusion (how much blur is still perceived as sharp)
A key idea is that a lens truly focuses at only one distance; everything else is slightly blurred, but some blur is small enough that we still accept it as “in focus.” Hyperfocal distance is based on that acceptable blur limit.
Also, it’s not always ideal. It’s most useful with wide-angle lenses, and less practical as focal length gets longer.
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