3.6mm vs 6mm vs 8mm vs 12, 15, 30 cctv camera lens comparison

Lens is the eye of the security cameras. It's focal length determined the camera's field of view or how wide the camera can see and how far the camera can see. It's important to choose the correct camera lens for security cameras, or choose correct camera with correct lens. In surveillance market, there are 3.5mm, 3.6mm, 6mm, 8mm, 12mm, 30mm, 60mm, 100mm lens. Using the lens calculator, you may get a idea on the filed of view for the lens, but you may not get a clear idea what the camera will see in real surveillance scene.

Lens calculator: http://www.hkvstar.com/technology-news/cctv-security-camera-lens-calculator.html

Below is a flash based lens comparison chart, it allow user to compare the field of view for each of lens.

The flash is too small? click the link to enlarge it: http://www.hkvstar.com/images/lens_compare.swf