By John Bart
Get a good face shot!
Use Higher quality cameras at entry areas Doors, gates and
other entry areas need a good quality, high resolution
camera to record a good 'face shot.' The video from this
camera should be considered a highly valuable since it can
be used as evidence in identifying a person in a court of
law.
Wide Angle Cameras for large surveillance areas
Once you can get a good shot of a persons face, you should
use a wider angle camera lens for the interior surveillance
spaces of the building. Using color cameras inside your
building is a good idea because you can readily identify a
person by the clothes they are wearing. Used in conjunction
with the face shot at the entry point, you have an
excellent record of all people and activities in your
surveillance areas.
Use Bullet Security Cams and Dome Security Cams!
They're Low Cost, High Performance, can be uses indoors and
outdoors and available in Color or B&W. Dome cams and
bullet cams come in many low cost models. Good quality
B&W cams start at less than $80 and good color cams
start at $150. When it comes to budgets, having a low cost
black & white camera is better than no camera at
all.
Black and white cameras have advantages over color security
cameras
Most B/W cameras can see in lower light and have higher
resolution than color cameras. If most of your surveillance
goals are at night and your budget is limited, a black
& white camera may actually be your best solution.
Professional and Standard C-Mount Cameras
If your budget permits, a c-mount camera offer a big
advantage over other cctv cameras.
C-Mount or CS-Mount?
C-mount and CS-Mount lenses offer similar performance, the
only real difference is the way the lens mounts to the
camera. And that's not a problem since the adapter to
convert 'C-Mount' to 'CS-Mount' comes with the camera. This
enables the camera to use either C-Mount or CS-Mount
lenses.
Lenses can be changed!
They simply unscrew from the camera body, just like the way
lenses are removed from traditional cameras. There are lens
options from 2.5mm up to 500mm providing many different
magnification options.
In general, an 8mm lens is like a 4mm lens magnified 200%.
A 16mm lens is like the 4mm lens magnified 400%
Outdoor Housing
C-mount cameras can be used outside when put in an outdoor
camera housing like the photo to the right needed to
protect the camera. Heat and Fans are necessary in the
'extreme climate areas.' See our outdoor housings
Varifocal Lenses
You can also use a varifocal lens on a c-mount camera body.
The higher millimeter of the lens the further distance
viewable. C-Mount cameras can use a varifocal lens. This is
a huge advantage because you can adjust zoom and focus.
With Varifocal lenses the focus can be varied from 5mm to
20mm or more.
Even after installed, the varifocal camera lens can be
adjusted to choose a variety of focal distances and angles
of view. An example of where you might use a varifocal lens
is outside (or inside) a warehouse or parking lot where you
need more distance than 35 feet.
Pan-Tilt-Zoom (PTZ)
Pan-Tilt-Zoom Cameras also known as PTZ cameras are
excellent devices to use when you want to 'look around'
your surveillance area.
PTZ cameras allow you to pan an entire room, tilt up and
down and zoom in on anything or anybody within the sight of
the lens.
PTZ cameras can be set to automatic or manual mode or both.
In automatic mode, hundreds of points can be set for the
camera to look at. The duration that the camera looks at a
given set point can be adjusted from less than a second to
as long as you would like.
There are some variances in different models. Some have 17x
zooms while others have 50x zooms or more.
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