Network Cabling; Optics; Using Manual Iris Lenses; Auto-Iris Lenses - Bosch MegaPixel IP Camera NWC-0800 User Manual

14 en | Camera reference
3.4

Network cabling

Category 5 cabling or better is recommended. All network
cabling must be installed according to applicable codes and
regulations.
3.5

Optics

The MegaPixel cameras should be used with a 1/2" or larger
optical format lens. The NWC-0900 requires two manual-iris
lenses and has a limitation on lens diameter (<38mm).
3.5.1

Using manual iris lenses

Choosing the lens correctly is very important for megapixel
cameras. A poorly selected lens may cause the image to appear
blurry when the lens iris is fully opened or closed too far. To
deliver sharp megapixel resolution images you should:
–
–
When setting up the camera, direct it at the scene and try clos-
ing the iris by several F-stops. At some point the image will look
its sharpest. Leave the iris closed at this value. In situations
where motion-blur can be expected, an iris value should be
selected that gives best balance of resolution, depth of focus,
and motion blur.
3.5.2

Auto-iris lenses

Standard DC auto-iris lenses can be used with the NWC-0700
and NWC-0800 cameras. Cable shall be minimum 20 mm or
longer.
3.5.3

Using auto-iris lenses

NWC-0700 and NWC-0800 are available with DC auto-iris
option. To use the DC auto-iris lens:
1.
2.
The camera will automatically detect the presence of an auto-
iris DC lens and start using it. Auto-iris lens operation typically
proceeds as follows:
–
F.01U.064.422 | V 1.0 | 2007.03
Use megapixel-resolution lenses;
Obtain best resolution and depth of focus by having the
iris slightly closed.
Attach the lens to the camera.
Plug the lens cable into the connector on the back of the
camera. Make sure that the lens cable is long enough.
Many DC lenses are available with short and long cable
options.
If illumination is sufficient, the camera will close the iris
within half-a-minute.
User Manual
MegaPixel IP Cameras
Bosch Security Systems