The field of view or image displayed on
your TV or monitor varies depending on the
size of your cameras image sensor
e.g.(1/4", 1/3", 1/2") and the lens size
used e.g.(4mm, 6mm etc.). This calculator
can help give you a better idea of the
correct lens size you will need to obtain
your desired field of view.
The larger the lens the more detail you
can see at a particular distance but
your field of view will be smaller. It
is similar to looking through stronger
and stronger binoculars. The 3.6mm lens
is very popular since it provides good
overall coverage and a wide field of
view, however if your goal is to get
facial details of someone at a distance
greater than 20 to 25 feet away you
would need a larger lens in the camera,
possibly a 6mm or 8mm. So you need to
decide what your viewing goal is and
whether one camera will be adequate or
if you need 2 or more.
Select the camera
sensor size you are using.
Enter any 2 of the 3
other pieces of information.
Press the "Calculate"
button to get the missing piece of
information. (Press the "Reset"
button to clear the form and start