Focal length (mm) to Horizontal angle of view (degrees) for APS-H 27.9mm

1 Focal length (mm) = 171.799579 Horizontal angle of view (degrees) ยท camera-equivalence calculation for APS-H 27.9mm

Direct Answer

On APS-H 27.9mm, a 50 mm lens gives about 31.178205 horizontal angle of view

This result uses the fixed APS-H 27.9mm sensor profile (crop factor 1.29).

For 14 Focal length (mm), this gives 89.795006 Horizontal angle of view (degrees) on APS-H 27.9mm.

Converter Calculator

171.799579 Horizontal angle of view (degrees)

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Explanation

Formula: HFOV = 2 x atan(27.9 / (2 x focal_mm)) in degrees. Why: this page keeps APS-H 27.9mm fixed, so crop factor and sensor width stay explicit for every calculation.

APS-H 27.9mm: a sensor profile with crop factor 1.29 and sensor width (horizontal) 27.9 mm, used as the fixed framing basis for this page.

Focal length (mm): a camera-equivalence quantity in this family that depends on the selected crop model.

Horizontal angle of view (degrees): a camera-equivalence quantity in this family that depends on the selected crop model.

This route is useful when you know the focal length on APS-H 27.9mm and want the resulting horizontal framing angle.

This page is sensor-profile dependent rather than universal because camera equivalence changes with sensor geometry (APS-H 27.9mm).

Method & Sensor Profile

  • Model basis: APS-H 27.9mm sensor profile with crop factor 1.29 and sensor width 27.9 mm.
  • Profile reference: APS-H 27.9mm (crop factor 1.29, sensor width 27.9 mm).
  • Consistency rule: forward and reverse pages keep the same sensor profile; only the formula direction changes.

Common Conversion Values

Focal length (mm)Horizontal angle of view (degrees)
14 89.795006
24 60.334591
28 52.966283
35 43.461627
50 31.178205
70 22.541151
85 18.640326
135 11.79925
200 7.979837

Frequently Asked Questions

Which sensor assumptions are fixed for focal length mm to horizontal angle of view (degrees)?

Focal length mm to horizontal angle of view (degrees) is fixed to APS-H 27.9mm, crop factor 1.29, sensor width 27.9 mm.

How do I reverse mm to deg for APS-H 27.9mm?

Use the opposite-direction page for APS-H 27.9mm to convert horizontal angle of view (degrees) back to focal length (mm) with the same sensor assumptions.

Can focal length mm to horizontal angle of view (degrees) replace full lens-design simulation?

No. Focal length mm to horizontal angle of view (degrees) provides framing and geometry approximations, not full optical-model behavior.

Reverse Conversion

Horizontal angle of view (degrees) to Focal length (mm) for APS-H 27.9mm

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