Horizontal angle of view (degrees) to Focal length (mm) for APS-H 27.9mm
Snapshot
On APS-H 27.9mm, a 50 horizontal angle of view needs about a 29.915872 mm lens. 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: To reach 14 Horizontal angle of view (degrees), you need 113.613633 Focal length (mm) 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
1,598.511669 Focal length (mm)
SwitchExplanation
Formula: focal_mm = 27.9 / (2 x tan(HFOV/2)). 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.
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 APS-H 27.9mm.
This page is sensor-profile dependent rather than universal because camera equivalence changes with sensor geometry (APS-H 27.9mm).
Common Conversion Values
| Horizontal angle of view (degrees) | Focal length (mm) |
|---|---|
| 14 | 113.613633 |
| 24 | 65.62959 |
| 28 | 55.950394 |
| 35 | 44.243747 |
| 50 | 29.915872 |
| 70 | 19.922665 |
| 85 | 15.223754 |
| 135 | 5.778279 |
| 200 | -2.459761 |
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 APS-H 27.9mm, crop factor 1.29, sensor width 27.9 mm.
How do I reverse deg to mm for APS-H 27.9mm?
Use the opposite-direction page for APS-H 27.9mm 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.