dallmeier DF2000A, Installation And Configuration Manual

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18
Color Video Camera DF2000A
Dallmeier electronic GmbH & Co.KG
IMPORTANT
Possible damage to the sensor caused by
improper cleaning.
Ensure that dirt does not end up on the sensor.
Use only clean compressed air if cleaning is
necessary. Under no circumstances may liquids
or cotton wool be used for cleaning.
Remove the protective cap from the lens mount.
Screw the lens onto the camera without using force.
6.3 Setting the back focus
The back focus is the distance between the lens support on the
camera and the picture sensor. Optimum focus is only possible
when the correct distance is set.
It may be necessary to set the back focus in individual cases due
to production tolerances of the lens.
The iris of the lens must be open as wide as possible (smallest iris
value) to set the back focus.
For lenses with automatic iris control, you will require an ND filter
(gray filter) to prevent the iris from closing in bright light.
Setting for lenses with a fixed focal distance
If the focus cannot be set exactly by turning the focus ring (lens),
proceed as follows:
1) Point the camera at an object with sufficient contrast. The
distance to the object should be greater than 1,000 x the focal
distance.
2) Open the iris on the lens.
3) Set the distance at the lens to infinity (
∞
).
4) Loosen the setting screw on the camera with the
accompanying hexagonal wrench.
5) Rotate the lens ring until the optimum focus is achieved.
6) Tighten the setting screw again.