Focal Length

Focal length of a lens for a security camera is measured in mm, and is the distance between the optical center of the lens and the point on which it focuses. A lower focal length results in less magnification with a greater field of view (FOV), and vice versa for longer focal lengths. The lens of a security camera can be either be fixed, meaning it can not be adjusted, or varifocal, meaning it can be manually adjusted. Typical fixed focal lengths are 2.6mm and 4mm. Typical varifocal lengths are 2.6-6mm, 4-9mm, 9-22mm and 5-50mm.

Get Free Video Surveillance Systems Quotes!

Special Report!

How to Choose the Right Security Camera 2nd Edition

The comprehensive guide has a strong focus on IP Technology.  Get your free download now!

Expanded with additional quick view charts, updated selection survey and mounting examples.

Enter your name and email below and we will send it right over!

Have a Question?

Please note that all fields followed by an asterisk must be filled in.

For a much more in-depth understanding please visit the Field of View page.

New! Comments

Leave your comments in the box below.

Get FREE home security quotes now!

Just fill in the form below.