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Focusing the Camera Lens
After you have selected the correct picture detail you have to adjust the lens focus.
The focus adjustment needs to be done with the iris fully open, since the camera has
the smallest depth of focus in this position. If the focus adjustment was not done with
the iris completely open, the picture would be sharp during the day but slowly getting
out of focus the more the light disappears. To fully open the lens, use a grey filter in
front of the lens, provided you are using a lens with automatic iris. Adjust the focus
while the iris is fully open using the lens focus ring. Make sure the most important
picture details are in optimum focus (use a service monitor). If it is not possible to
bring the picture into focus, please adjust the back focus of the camera as described
above.
If you intend to use I.R. illumination at a later stage, you must use an I.R. pass filter
together with the grey filter during focus adjustment to ensure that only I.R. light will
get through to the camera chip and the focus adjustment is done according to this
spectrum, only. Attention: I.R. light can only be used in combination with mono
cameras, not colour cameras!
Circuit points and operation
1. Lens connector
2. Menu keys
1
2
DC - Lens
1. Control -
2. C
3. Drive+
4. common
