CCTV Lens Calculator
You can work out the lens required using this simple method:
Distance from object multiplied by the Size of the CCD chip in mm, divided by horizontal or vertical Area equals the Lens required.
| D x S | = L |
| A |
The larger the CCD chip in the camera, the greater the field of view.
Below are typical CCD Chip sizes
- 1/3" = 4 mm
- 1/4" = 3.25 mm

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