Horizontal angle of view (degrees) to Focal length (mm) for Action camera 1/2.3" class
Snapshot
On Action camera 1/2.3" class, a 50 horizontal angle of view needs about a 6.862422 mm lens. Conversion Encyclopedia keeps the same sensor profile across the calculator, common values, and reverse page for this page.
- Sensor profile: Action camera 1/2.3" class (6.4 mm width, crop factor 5.6).
- Example: To reach 14 Horizontal angle of view (degrees), you need 26.061909 Focal length (mm) on Action camera 1/2.3" class.
- 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.
Interactive conversion
Converter Calculator
366.68368 Focal length (mm)
SwitchMachine access
Available to apps and AI agents
Horizontal angle of view (degrees) to Focal length (mm) for Action camera 1/2.3" class can be requested through Conversion Encyclopedia's structured interfaces by software and compatible AI agents. The action-cam-1-2-3 sensor profile tells the conversion engine which camera sensor setup belongs to the calculation.
Machine-readable identifiers
- Conversion family
camera-focal-equivalence- Source unit
horizontal_angle_of_view_degree- Target unit
focal_length_mm- Sensor profile
action-cam-1-2-3
The JSON API and OpenAPI specification use the identifiers to reach the conversion engine. WebMCP lets compatible AI agents request the same calculation.
Example API request and response
POST /api/v1/convertRequest
{
"family": "camera-focal-equivalence",
"value": 1,
"from": "horizontal_angle_of_view_degree",
"to": "focal_length_mm",
"parameters": {
"sensorProfile": "action-cam-1-2-3"
}
}Essential response
{
"ok": true,
"conversion": {
"family": "camera-focal-equivalence",
"value": 1,
"from": "horizontal_angle_of_view_degree",
"to": "focal_length_mm",
"result": {
"raw": 366.68368041379074,
"display": "366.68368"
},
"canonicalPath": "/camera-focal-equivalence/horizontal-angle-of-view-degrees-to-focal-length-mm-at-action-cam-1-2-3/"
}
}Explanation
Formula: focal_mm = 6.4 / (2 x tan(HFOV/2)). Why: this page keeps Action camera 1/2.3" class fixed, so crop factor and sensor width stay explicit for every calculation.
Action camera 1/2.3" class: a sensor profile with crop factor 5.6 and sensor width (horizontal) 6.4 mm, used as the fixed framing basis for this page.
Horizontal angle of view (degrees): a camera-equivalence quantity in this family that depends on the selected crop model.
Focal length (mm): a camera-equivalence quantity in this family that depends on the selected crop model.
This route is useful when you know the target horizontal framing angle and need the focal length required on Action camera 1/2.3" class.
This page is sensor-profile dependent rather than universal because camera equivalence changes with sensor geometry (Action camera 1/2.3" class).
Common Conversion Values
| Horizontal angle of view (degrees) | Focal length (mm) |
|---|---|
| 14 | 26.061909 |
| 24 | 15.054816 |
| 28 | 12.834499 |
| 35 | 10.149103 |
| 50 | 6.862422 |
| 70 | 4.570074 |
| 85 | 3.492187 |
| 135 | 1.325483 |
| 200 | -0.564246 |
Questions & answers
Frequently Asked Questions
Which sensor assumptions are fixed for horizontal angle of view (degrees) to focal length mm?
Horizontal angle of view (degrees) to focal length mm is fixed to Action camera 1/2.3" class, crop factor 5.6, sensor width 6.4 mm.
How do I reverse deg to mm for Action camera 1/2.3" class?
Use the opposite-direction page for Action camera 1/2.3" class to convert focal length (mm) back to horizontal angle of view (degrees) with the same sensor assumptions.
Can horizontal angle of view (degrees) to focal length mm replace full lens-design simulation?
No. Horizontal angle of view (degrees) to focal length mm provides framing and geometry approximations, not full optical-model behavior.