Lens Calculator

   This tool can be used to calculate the distance, lens size (focal length), or the height and width
   of the field of view, by entering values for the other inputs. Select one of the following and
   then enter the required values:

 

Width (ft)
Image of arrow
Height (ft) Image of arrow Image of scene Distance to object (ft) Image of camera
Image of arrow
Focal length (mm)

 

How to use the Lens Calculator:

1. To find out which lens you need, enter the target distance of the object,
and the Width and Height (in feet) of the field of view.

2. To calculate the field of view you can expect with a given lens,
enter the target distance of the object, and the lens size (focal length) in millimeters.

3. Click "Calculate". Make sure you click "Clear" before you make a new calculation.

Distance to Target ft
Lens Size mm
Field of view Width (H)x Height (V):
ft x ft
Calculate | Clear