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UTAHNETCAM.COM: LENSES

Lenses: The f-stop rating determines the speed of the lens. The lower the f-stop rating the more light the lens passes. The greater the millimeter of the lens, the smaller the angle of view.

Basic Types of Lenses: Fixed Focal Length (Manual/Auto Iris) - Varifocal Length (Manual/Auto Iris, Normal to Wide Angle of view) - Zoom (w/DC Drive) - Megapixel Lenses for Megapixel Cameras

Special Application Lenses: Pinhole (covert) - Aspherical (wide viewing angle) - IR Corrected (night time)

Calculating a Lens: LENS(MM) = Distance/Subject x Camera Format (1/4,1/3,1/2)

HELPFULL CAMERA TOOLS

Pelco Field of View Calculator "Calculate Lens millimeter selection according to area size"

Download the Pelco Camera Tool Pelco Camera Tool .exe

Discount Security Cameras: Lense Calculator