26
Nov
What Is A Varifocal Security Camera?
One of the best values in security cameras are those equipped with a varifocal lens. These lenses come for a variety of camera styles with the two most popular...
20
Oct
Security cameras utilize two basic lens types based on focusing parameters. These are called fixed lens cameras and varifocal cameras. Fixed lenses have a “fixed” or constant, unchangeable focal length while varifocal lenses have a focal length that can vary. A more familiar term used for electric powered varifocal lenses is a “Zoom” lens; we will concentrate on the varifocal type in the following article.