Machine Vision & Industrial Inspection AI worked example

Field of View with camera sensor width of 4.4 mm: a worked example

Suppose camera sensor width falls to 4.4 mm. This page works the full calculation at that level so you can see exactly which result moves and by how much. Calculate the horizontal field of view (FOV) of a machine vision camera from sensor width, lens focal length, and working distance, so you can confirm the camera sees the full inspection area at the chosen working distance.

The inputs for this scenario

  • Camera sensor width: 4.4 mm (the input this scenario stresses; the baseline uses 8.8)
  • Lens focal length: 16 mm (held at the documented default)
  • Working distance: 400 mm (held at the documented default)

Working through the calculation

  • The calculation starts from the formula this tool documents: Horizontal FOV = (sensor width / focal length) x working distance.
  • Horizontal field of view (FOV) works out to 110 mm at these inputs, and this is the headline figure for the scenario.
  • Sensor-to-focal-length ratio works out to 0.28 value at these inputs.
  • Working distance works out to 400 x at these inputs.
  • Lens focal length works out to 16 value at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where camera sensor width sits at 8.8 mm and the headline result is 220 mm, this scenario comes in 50% below the baseline at 110 mm.
  • It computes the horizontal field of view in mm from camera sensor width, lens focal length and working distance using the similar-triangles optics relationship. When the numbers land here, the stressed input is the lever to work; the walkthrough above shows exactly how much each output recovers as it climbs back toward the baseline.

Results at a glance

  • Horizontal field of view (FOV): 110 mm (headline result)
  • Sensor-to-focal-length ratio: 0.28 value
  • Working distance: 400 x
  • Lens focal length: 16 value

Run it with your numbers

  • To rerun this with your own numbers, open the live Field of View calculator, set camera sensor width to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.