Calculate depth of field from focal length, aperture, focus distance and sensor size, giving near and far limits and hyperfocal distance.
光圈越小、焦距越短、距离越远,景深越大。
| Item | Formula / Rule | Source / Standard |
|---|---|---|
| Hyperfocal distance | H = f² ÷ (N × c) + f with N the f-number and c the circle of confusion | Kingslake, Optics in Photography, SPIE Press, 1992 |
| Depth limits | Near = H × s ÷ (H + s − f) and far = H × s ÷ (H − s + f) for s < H | Kingslake, Optics in Photography, SPIE Press, 1992 |
| Circle of confusion | Full frame uses 0.03 mm, about 1/1500 of the diagonal, while APS-C uses 0.02 mm | ISO 12231:2012 Photography — Vocabulary |
摄影参数、曝光与画质的快速参考。