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The lens
Caution: Do not touch the glass of the lens. This could damage the
delicate coating on its surface. If the lens has to be cleaned, use a
special lens cleaning tissue, available at any good camera store.
Focus range
The built-in lens provides an optimal image sharpness for objects between
1 metre and infinity (depth of field).
Cable
A 4-wire sytem cable (see specifications) is supplied as standard.
For an optimum picture and sound quality a standard dual 'twisted-pair'
(telephone) cable should be used (fig. C).
The maximum distance that can be bridged (without a cable extension
adapter) between the monitor and the cameras is 300 meters (200 meters
for colour cameras).
Caution: The plugs used for the observation system have the same
dimensions as standard telephone plugs. Never connect a telephone to
the camera or system monitor.
Tips for maintenance
Cleaning - The outside of the camera can be cleaned with a moist fluff-
free cloth or a chamois leather cloth.
When cleaning the lens a special lens cleaning cloth should be used.
Do NOT use cleaning fluids based on alcohol, methylated spirit,
ammonia etc..
Avoid direct contact with water.
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