Photography & Imaging
Advanced

Hyperfocal Distance

Focus distance that keeps everything from H/2 to infinity sharp.

Formula

H=f2Nc+fH = \frac{f^2}{N c} + f

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Variables

HHyperfocal distance (mm)
fFocal length (mm)
NF-number
cCircle of confusion (mm)

Example

f=24 mm, N=11, c=0.03: H ≈ 1.77 m

Did You Know?

Landscape shooters focus at the hyperfocal distance to maximise sharpness from foreground to horizon.

photographyhyperfocallandscape

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F-Number

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Aperture f-number is focal length divided by aperture diameter.

Exposure Value (EV)

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Combines aperture and shutter speed into one exposure figure.

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Field of view from sensor size and focal length.

Equivalent Focal Length

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