This is by far the most important factor to consider when choosing a camera
for a particular location and function!!!

We have two important links for you to explore

Here is the first one...........

http://www.duncansonline.ca/FAQs/lenscompare.htm

Here is the second one......

http://www.supercircuits.com/resources/tools/fov-comparison-tool

Don't hesitate to contact us to chat about this subject.

Call us toll free at 1-888-445-8375 anytime.

Use this tool to see how much space you will need on the hard drive of your DVR to
store different variations of capturing video.

This will help you choose what size hard drive you need, and how best
to set up your motion detection on each camera.

 http://www.supercircuits.com/resources/tools/security-dvr-storage-calculator

Use this tool to see how different no light and low light camera implementations compare. The use of no IR illuminator, a built-in IR, or an external IR illuminator will have a significant impact on image quality.

http://www.supercircuits.com/resources/tools/ircompare

Use this tool to compare various covert cameras. See how black and white, color , high res, day/night, and super stealth covert cameras compare to one another in a dark stock room.

http://www.supercircuits.com/resources/tools/covert-compare

  Use this calculator to view the voltage drop of either 24 volt or 12 volt power along a distance of cable
http://www.supercircuits.com/resources/tools/voltageDrop

See for yourself how various frame rates compare.

http://www.supercircuits.com/resources/tools/video-frame-rate-comparison