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Step 1 — Select the lens format you are using.


14 inch
13 inch
12 inch
23 inch
1 inch


Step 2 — Enter any 2 of the 3 other pieces of information.

D Enter distance to object (in feet): 
W Enter  width of picture (in feet): 
H Enter height of picture (in feet): 

L Enter  size of lens (in millimeters): 

3. Press Calculate” to get the missing information.
(Press Reset” to clear the form.) 

illustration with camera viewing features: distance, height, focal length

Have questions? We can help

Our video security experts can help you implement the right security system for your business.