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Field of View Calculations
- Angle of View: The angular extent of the scene that a lens captures, measured in degrees.
- Field of View: The actual dimensions of the area captured at a specific distance, measured in linear units (feet, meters, etc.).
The angle of view is calculated using this formula:
Angle of View = 2 × arctan(Sensor Dimension ÷ (2 × Focal Length))
Where "Sensor Dimension" can be diagonal, horizontal, or vertical measurement depending on which angle you're calculating.
Manufacturers usually specify the diagonal angle because it's the largest of the three measurements (diagonal, horizontal, vertical), making their lenses appear to have a wider field of view in marketing materials.
Several factors may cause slight differences:
- Manufacturers may use simplified formulas or rounding
- Optical distortion and lens design factors
- Different reference points for measurement (entrance pupil vs. front element)
- Marketing-driven adjustments to appear more competitive
Our calculator uses precise trigonometric formulas for maximum accuracy.
© 2025 Weil Jimmer @ WBFT. All rights reserved.
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