Camera Focal EquivalenceFocal Length Mm to Horizontal Angle of View Degrees At Aps H 27 9mm

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

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.

Interactive conversion

Converter Calculator

Decimals: 1.5 or 1,5. Fractions: 1/2. Scientific notation: 1e3. Write 1000 without grouping separators.

171.799579 Horizontal angle of view (degrees)

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API and AI agent access

Focal length (mm) to Horizontal angle of view (degrees) for APS-H 27.9mm. sensor profile: aps-h-27-9mm.

Machine-readable identifiers

Conversion family: camera-focal-equivalence
Source unit: focal_length_mm
Target unit: horizontal_angle_of_view_degree
Sensor profile: aps-h-27-9mm

Use these identifiers in the API request. Sources and model limits also apply to software clients.

Example API request and response

POST /api/v1/convert

Request

{
  "family": "camera-focal-equivalence",
  "value": 1,
  "from": "focal_length_mm",
  "to": "horizontal_angle_of_view_degree",
  "parameters": {
    "sensorProfile": "aps-h-27-9mm"
  }
}

Essential response

{
  "ok": true,
  "conversion": {
    "family": "camera-focal-equivalence",
    "value": 1,
    "from": "focal_length_mm",
    "to": "horizontal_angle_of_view_degree",
    "result": {
      "raw": 171.79957857541754,
      "display": "171.799579"
    },
    "canonicalPath": "/camera-focal-equivalence/focal-length-mm-to-horizontal-angle-of-view-degrees-at-aps-h-27-9mm/"
  }
}

API, OpenAPI and WebMCP documentation

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.

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

Questions & answers

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.