A must have for anyone who is installing or ordering security cameras. Choosing the right lense is as easy standing at each camera point and adjusting this easy to use tool.

Carry this amazing tool in your toolbox and know that you are purchasing the correct cameras/lenses for your security camera installation. Try any number of focal lengths and camera positions. Then select exactly the optimal camera locations and focal lengths. Handles 1/3', 1/2", and 1" CCD formats. Comes complete with carrying case and lanyard.