Horizontal angle of view (degrees) to focal length mm at APS-H 27.9mm

1 Horizontal angle of view = 1,598.511669 Focal length · profile-dependent conversion · context: sensor profile

Direct Answer

1 Horizontal angle of view equals 1,598.511669 Focal length

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

For 2 Horizontal angle of view, this profile returns 799.194965 Focal length.

Converter Calculator

1 Horizontal angle of view (degrees) =
1,598.511669 Focal length (mm)

Explanation

APS-H 27.9mm uses crop factor 1.29 and sensor width 27.9 mm. focal_mm = 27.9 / (2 x tan(HFOV/2)). For input 1 deg, output is 1598.5116693 mm.

For Horizontal angle of view to Focal length, the active sensor profile determines the conversion constants applied to every value.

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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

Horizontal angle of view (degrees)Focal length (mm)
1 1,598.511669
2 799.194965
5 319.507529
10 159.44923
14 113.613633
18 88.076834
24 65.62959
35 44.243747
50 29.915872
85 15.223754
100 11.70544
135 5.778279
200 -2.459761