Lens Calculator

Need to find the Angle or Field of View?
Enter the focal length and distance below to immediately update the data table.

Set focal length (mm)
Set distance (m)

lens format	focal length	horizontal deg	vertical deg		width	height
1/4"
1/3"
1/2"
2/3"
1"
35mm

The units of distance are implied - i.e. if you enter a value in Feet the answer will be returned in Feet.

All figures are for an Under-scanning monitor. CCIR specification allows for monitors to Over-scan by up to 10%.