Focal length mm to horizontal angle of view (degrees) at Action camera 1/2.3" class
1 Focal length = 145.291951 Horizontal angle of view · profile-dependent conversion · context: sensor profile
Direct Answer
1 Focal length equals 145.291951 Horizontal angle of view
This result depends on the selected profile context: sensor profile.
For 2 Focal length, this profile returns 115.989234 Horizontal angle of view.
Converter Calculator
1 Focal length (mm) =
145.291951 Horizontal angle of view (degrees)
Explanation
Action camera 1/2.3" class uses crop factor 5.6 and sensor width 6.4 mm. HFOV = 2 x atan(6.4 / (2 x focal_mm)) in degrees. For input 1 mm, output is 145.291950727 deg.
From Focal length to Horizontal angle of view, results depend on the selected sensor profile and stay consistent with that profile across table rows and calculator input.
Read more
Keep the same profile in both directions to avoid mixing lookup systems that use different size mappings.
Common Conversion Values
| Focal length (mm) | Horizontal angle of view (degrees) |
|---|---|
| 1 | 145.291951 |
| 2 | 115.989234 |
| 5 | 65.238486 |
| 10 | 35.489343 |
| 14 | 25.750003 |
| 18 | 20.161196 |
| 24 | 15.189287 |
| 35 | 10.447895 |
| 50 | 7.323871 |
| 85 | 4.311999 |
| 100 | 3.665679 |
| 135 | 2.715736 |
| 200 | 1.833309 |