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Depth of Field & Field of View Calculator


Please review the assumptions and calculations performed prior to relying on the information generated from this calculator.

Negative Format
Lens focal length (mm)
Selected aperture
Subject distance (mtrs)


Depth of field results  
Hyperfocal distance for this lens/aperture combination
mtrs
Near limit of acceptable sharpness
mtrs
Far limit of acceptable sharpness
mtrs
Total depth of field
mtrs

Field of view results
Horizontal field of view deg
Vertical field of view deg
Diagonal field of view deg

Assumptions

The following set of assumptions with regard to CoC are based on the Zeiss formula with the diagonal based on the useable image area rather than the entire negative.

Format Useable Image Area CoC
35 mm 24 x 36 mm 0.025
6×45 cm 56 x 42 mm 0.040
6×6 cm 56 x 56 mm 0.046
6×7 cm 56 x 70 mm 0.050
6×9 cm 56 x 84 mm 0.058
6×12 cm 56 x 112 mm 0.072
6×17 cm 56 x 165 mm 0.075
5×4 inch 95 x 120 mm 0.088
5×7 inch 120 x 170 mm 0.120
8×10 inch 190 x 245 mm 0.180
 

Calculations

Circle of confusion calculations are are based on the Zeiss formula and derived from the calculation of d/1730 where d is the diagonal of the film format. Field of View calculations are for rectilinear lenses only.

i.e. for 35mm 43/1730 = 0.025

Hyperfocal distance is calculated as follows: h = f^2/(N*c) + f

Nearest focus is calculated as follows: Dn = d(H-f)/H+d

Furthest focus is calculated as follows: Df = d(H-f)/H-d

Rectilinear field of view is calculated as follows: FOVr = 2 * arctan (frame diagonal/(f * 2)) where:

  • f = focal length
  • N = F number (aperture)
  • c = circle of confusion (mm)
  • H = Hyperfocal distance
  • Dn = closest focus
  • Df = farthest focus