CCTV Lens Field of View Calculator The function of the lens is
to collect light reflected from the scene and focus it into an
image onto the CCTV camera sensor. Most CCTV applications use a
fixed-focal-length (FFL) lens, which, like your eye's lens,
covers a constant angular field of view (FOV). That is, the FFL
images a scene with constant magnification. A large variety of
CCTV camera lenses are available with different focal lengths
(FLs), which will provide different FOVs. Wide-angle, medium-
angle, or narrow-angle lenses produce different magnifications
and FOVs. How to use this tool This handy FOV calculator will
help you in determining which lens is right for your
application. Enter the camera lens format, the distance to the
object, focal length of the lens, and click "Calculate" to see
the field of view you can expect with that lens. It also works
in reverse. If you know the field of view you need, enter it and
the distance to the object along with camera format to find the
focal length you will need t