Focal length mm to horizontal angle of view (degrees) at APS-H 27.9mm

1 Focal length = 171.799579 Horizontal angle of view · profile-dependent conversion · context: sensor profile

Direct Answer

1 Focal length equals 171.799579 Horizontal angle of view

This result depends on the selected profile context: sensor profile.

For 2 Focal length, this profile returns 163.682298 Horizontal angle of view.

Converter Calculator

1 Focal length (mm) =
171.799579 Horizontal angle of view (degrees)

Explanation

APS-H 27.9mm uses crop factor 1.29 and sensor width 27.9 mm. HFOV = 2 x atan(27.9 / (2 x focal_mm)) in degrees. For input 1 mm, output is 171.799578575 deg.

Focal length to Horizontal angle of view is profile-bound here: the selected sensor profile controls the mapping used by calculator and reference table.

Read more

Keep the same profile in both directions to avoid mixing lookup systems that use different size mappings.

Method & Reference (Verified)

  • Method basis: profile-bound mapping; constants depend on the selected profile encoded in the route.
  • Profile reference: sensor profile.
  • Consistency rule: keep the same profile in mirror direction to avoid mixing incompatible mappings.

Common Conversion Values

Focal length (mm)Horizontal angle of view (degrees)
1 171.799579
2 163.682298
5 140.562312
10 108.730619
14 89.795006
18 75.551369
24 60.334591
35 43.461627
50 31.178205
85 18.640326
100 15.883023
135 11.79925
200 7.979837