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Estimate hyperfocal distance, the near and far edges of acceptable sharpness, and the width of the depth of field from focal length, f-number, focus distance, and a circle-of-confusion preset (or your own CoC in millimeters).
Last updated: April 17, 2026
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Distance to the plane you focus on (not working distance with macro tubes).
Hyperfocal distance
29.81 m
Total DoF width
0.601 m
Near limit (sharp side)
2.729 m
Far limit
3.330 m
Model limits:
From f, N, and CoC
H ≈ f + f²/(N·CoC)
Thin-lens style
Uses focused distance s
Judgment-based
Override when needed
50 mm, f/2.8, 3 m focus, full-frame CoC — hyperfocal distance about:
29.81 m
Total DoF width ≈ 0.601 m
The tool first computes a hyperfocal distance in millimeters using your focal length, f-number, and circle of confusion, then converts to meters. It applies standard thin-lens style near and far limit formulas for a focused subject distance. When the focus distance reaches or exceeds the hyperfocal distance, the far limit is treated as infinity in this simplified model, and total depth is reported accordingly.
H = f + f²/(N·CoC)Dn = s(H − f)/(H + s − 2f)Df = s(H - f)/(H - s) when s < H29.81 m
Compare to your scene: stop down for more depth, open up for subject isolation.
Share it with photographers planning aperture and focus distance in the field.
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