Fig. 1.

Concepts in digital frame camera photography: a Thin lens model and corresponding depth of field with focus distance (s), near and far depth of field limits ($D_{\text{N}}$/$D_{\text{F}}$) and imaged points (red, brown and green) on schematic drawing of sensor with size ($S_{x^{\prime }}$) and number of recorded pixels ($S_a$) on x-axis, distance between pixel centers ($S_{\delta }$) and circle of confusion limit (c). b Same lens as in a but with closed aperture (N)