Most of the people are confused to choose which lens is right for their application of the security camera, due to variety of lenses.the picture gives you a barrest idea about lens. Generally normal dome cameras having 3.6mm lens which covers 72-90 degree angle.if you go ahead with 6mm lens camera the angle of coverage will be 50-60 degree,which means lower mm lens covers wide angle.whereas higher mm lens camera used for zooming purpose.

Most of the people are confused to choose which lens is right for their application of the security camera, due to variety of lenses.the picture gives you a barrest idea about lens. Generally normal dome cameras having 3.6mm lens which covers 72-90 degree angle.if you go ahead with 6mm lens camera the angle of coverage will be 50-60 degree,which means lower mm lens covers wide angle.whereas higher mm lens camera used for zooming purpose.