Fixed Iris (FI)

A fixed iris is a part of widely used fixed iris lenses that are inexpensive and are found in smaller types of fixed CCTV security cameras, usually small case or dome cameras. A fixed iris can not be adjusted for light conditions. Therefore you must make sure the lighting is optimal at all times in order to get acceptable video images from a camera with this type of iris. Many fixed focal length lenses use this type of of iris. However, there are many that will still have an auto iris or electronic shutter feature.

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 more information on lenses and use in security camera systems please seeAperture, Depth of Field, Field of View, andF-stop.

Also see Manual Iris and Auto Iris.

Click here to learn more about choosing the right security camera.

New! Comments

Leave your comments in the box below.

Get FREE home security quotes now!

Just fill in the form below.