Notes on depth of field « Huixuan’s Academic Notes

Posted by: hxtang | November 4, 2008

Notes on depth of field

The DOF is determined by the subject distance, the lens focal length, and the lens f-number (relative aperture).

$\displaystyle DOF \thickapprox \frac{2Hs^2}{H^2-s^2}$ for $s \geq H$

$DOF \thickapprox \displaystyle \frac{2Ncf^2s^2}{f^4 - N^2c^2s^2}$ for $s > H$

At close-up distances, DOF is approximately determined by the subject-magnification and the lens f-number.

$DOF \thickapprox 2Nc\left(\displaystyle \frac{m+1}{m^2}\right)$

References:
[1] Depth of field – Wikipedia