Hi End Security CCD Lens Calculator
This calculator finds the lens size (focal length/mm) and the appropriate field of view, based on data entered for the CCD size, the distance from the camera to the target area, and the width of the target area to be imaged. Enter the numeric value for the distance from the camera to the target area and enter the numeric value for the width of the target area. All calculations take place at each entry. You may however, click 'Calculate' to update if needed.