Installation Instructions
4
•
All GE cameras support the use of C and CS type lenses.
Four types of lenses can be used with the digital range of cameras (see section
Setup
for
pictures):
•
Fixed Iris
and
Manual Iris
lenses are recommended for internal applications, and where the
light levels are constant. These lenses do not require any wiring connections to the camera.
Ensure that the Lens Mode switch on the rear of the camera is set to
AES
.
•
Auto Iris
lenses and
Direct Drive
lenses are connected to the camera via the auto-iris
connector and are suitable for both internal and external applications. A suitable 4-pin
connector is provided within the camera packaging. For the wiring connections for both types
of lenses, refer to this manual and the lens manufacturer documentation.
•
An
Auto Iris
lens internally monitors the video signal from the camera, and automatically
adjusts the iris to the varying light levels. Typically, these lenses provide a level adjustment
on the side on the lens casing (refer to the lens manufacturer documentation). Ensure that
the Lens Mode switch is set to
VD
when using an auto iris lens.
•
A
Direct Drive
lens is controlled internally from the camera, and automatically adjusts the iris
to the varying light levels. To adjust the level of the lens to obtain 1 Volt p-p, use the DC level
adjustment potentiometer on the side of the camera. Ensure that the Lens Mode switch is set
to
DD
when using a Direct Drive lens.
L
ENSES
– S
ET UP GUIDE
Fixed Iris lenses
- Set the lens focus to infinity and view an image greater than 5 meters away. If
the picture is not clear and appears out of focus, use the back focus adjustment to improve the
picture.
Manual Iris lenses
- Open the iris fully and set the lens focus to infinity. View an image greater
than 5 meters away. If the picture is not in focus, use the back focus adjustment to improve the
picture. Adjust the focus and iris as required.
Auto-Iris and Direct Drive lenses
- Fully open the iris by covering the lens with a suitable neutral
density filter (ND) (not supplied). Set the lens focus to infinity and view an image greater than 5
meters away. Focus the image using the back focus adjustment. Remove the ND filter and adjust
the focus as required. Repeat this process to confirm.
Focussing may vary between day and night time, and the amount of infra red light viewed by the
camera.
