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

MethodologyยทHow We Verify

Snapshot

On APS-H 27.9mm, a 50 mm lens gives about 31.178205 horizontal angle of view. Conversion Encyclopedia keeps the same sensor profile across the calculator, common values, and reverse page for this page.

  • Sensor profile: APS-H 27.9mm (27.9 mm width, crop factor 1.29).
  • Example: For 14 Focal length (mm), this gives 89.795006 Horizontal angle of view (degrees) on APS-H 27.9mm.
  • Use the reverse page if you need the opposite direction with the same basis.

Use the interactive calculator below for custom values and the common-value table for quick checks.

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

  • Sensor basis: APS-H 27.9mm profile with crop factor 1.29 and sensor width 27.9 mm.
  • Profile reference: focal-length and aperture equivalence use the same crop model, while angle-of-view routes use the same fixed sensor width geometry.
  • 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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