SeeGuard Surveillance Systems Inc. installs a full range of C/CS mount security camera lenses for CCTV security camera bodies, including fixed focal length, vari-focal, fixed iris, manual iris and auto iris lenses.

It is important to use the right lens for the light conditions and desired field of view, otherwise the images seen and recorded will not be satisfactory. CCTV security cameras using integral lenses are less expensive but do not offer lens choices and are therefore limited in their usefulness. The important factors that govern the choice of lens are linked below:

Focal Length
The Lens Iris
The "F Stop"

Video: Camera Focal Length and Postion