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At Gadget-spot, we aim to provide the highest level of service and value for money.
All of the information found on this site has been provided to help you in selecting the best products for your requirements.
Lens Options
All of the lenses available from this site are suitable for our cameras. However, some cameras such as the NC800 or GS800 do not support alternative lens installation.
Also, while all of the lenses shown will physically fit the NC1000 or GS1000 range, these cameras require a minimum focal length lens (Check the lens details for exclusions)
One of the difficult problems when setting up a CCTV system, is choosing
the right lens for your cameras. Different lens giving different fields of
view, and different levels of zoom. Some of the higher-end lenses also offer
features such as Auto-Iris, and manual zoom/focus adjustment. Choosing the
wrong lens can lead to a camera monitoring too small an area, or conversely
not having enough zoom to capture events with clarity.
The following images demonstrate the differences in lens sizes. These images were taken from a tripod 10 meters from the building, using one of each of the available 4.3, 6,
8, 12,
and 16mm lenses. Aside from the lens size, the camera was identical,
and the position of the camera does not change.
4.3mm Lens
6mm Lens
8mm Lens
12mm Lens
16mm Lens
Adjustable lenses are marked with their maximum and minimum sizes.
Examples are 3.5 - 8mm lenses (of which the 6mm sample above would be roughly
in the middle of this range), and telephoto lenses that range from around 5
to 50mm.
Lenses for CCTV Body cameras are also available as "Auto-Iris"
types. These have a lead that connects to the camera itself, and provides
the camera with the ability to let in more light in dark conditions, and
less in bright conditions. This helps avoid the common problem of
"sunrise glare", where the rising sun shines directly into the
camera, completely blinding the camera's view.
Auto-Iris lenses are available as two types, DC-Drive and Video Drive.
DC-Drive lenses use a control signal from the camera to adjust the iris
size, whereas video-drive lenses adjust the iris size based on the
brightness of the image in the video signal.
Lenses are either DC drive or Video Drive, but never both.
NOTE: The GS1000 and NC1000 cameras do not have auto iris connectors.
