THIS CALCULATOR IS NOT EXACT, ESPECIALLY WHEN THE FOV OR WD IS LESS THAN AT = LEAST 25x THE SIZE OF THE SENSOR (100-250mm as your minimum size for FOV/WD).
NOTE: WD and FOV must be in the same units (e.g. in, ft, etc.).
Focal Length/FOV Calculator by Sensor Size
Focal Length/FOV Calculator by Pixels
1stVision not responsible for errors in calculations. Please check your work.
WD - Working Distance - distance from the front of the lens
FOV - Field of View, width of picture
FL - focal length of the lens