Horizontal angle of view (degrees) to Focal length (mm) for Compact 1/2.5" class
1 Horizontal angle of view (degrees) = 330.015312 Focal length (mm) ยท camera-equivalence calculation for Compact 1/2.5" class
Direct Answer
On Compact 1/2.5" class, a 50 horizontal angle of view needs about a 6.17618 mm lens
This result uses the fixed Compact 1/2.5" class sensor profile (crop factor 6.8).
To reach 14 Horizontal angle of view (degrees), you need 23.455718 Focal length (mm) on Compact 1/2.5" class.
Converter Calculator
330.015312 Focal length (mm)
SwitchExplanation
Formula: focal_mm = 5.76 / (2 x tan(HFOV/2)). Why: this page keeps Compact 1/2.5" class fixed, so crop factor and sensor width stay explicit for every calculation.
Compact 1/2.5" class: a sensor profile with crop factor 6.8 and sensor width (horizontal) 5.76 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 Compact 1/2.5" class.
This page is sensor-profile dependent rather than universal because camera equivalence changes with sensor geometry (Compact 1/2.5" class).
Common Conversion Values
| Horizontal angle of view (degrees) | Focal length (mm) |
|---|---|
| 14 | 23.455718 |
| 24 | 13.549335 |
| 28 | 11.551049 |
| 35 | 9.134193 |
| 50 | 6.17618 |
| 70 | 4.113066 |
| 85 | 3.142968 |
| 135 | 1.192935 |
| 200 | -0.507822 |
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 Compact 1/2.5" class, crop factor 6.8, sensor width 5.76 mm.
How do I reverse deg to mm for Compact 1/2.5" class?
Use the opposite-direction page for Compact 1/2.5" 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.