Master your camera's focus with our free Depth of Field (DOF) Calculator. Quickly determine near focus distance, far focus distance, and total DOF using your camera's focal length, aperture, subject distance, and circle of confusion. Essential for stunning photographic results.
Formula:
Understanding DOF: Key Formulas
The Depth of Field (DOF) calculation involves several interconnected formulas:
- Hyperfocal Distance (H):
H = f2 / (N * c) - Near Focus Distance (NFD):
NFD = (H * s) / (H + (s - f)) - Far Focus Distance (FFD):
FFD = (H * s) / (H - (s - f)) - Depth of Field (DOF):
DOF = FFD - NFD
Where:
- f = Focal Length (e.g., in mm)
- N = Aperture (f-stop number)
- c = Circle of Confusion (e.g., in mm)
- s = Subject Distance (e.g., in mm)
For accurate results, ensure all linear measurements (f, c, s) are in the same units during calculation.