dallmeier DF2000A, Installation And Configuration Manual

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Dallmeier electronic GmbH & Co.KG
Setting for lenses with a variable focal distance (zoom)
If the focus changes as the focal distance changes, proceed as
follows:
1) Point the camera at an object with sufficient contrast at a distance
of approx. 2 m.
2) Open the iris on the lens.
3) Set the maximum focal distance (Tele) at the lens.
4) Set the optimum focus with the focus ring.
5) Set the smallest focal distance (wide angle).
6) Loosen the setting screw on the camera.
7) Rotate the lens ring until the optimum focus is obtained.
You may need to repeat Steps 3, 4, 5 and 7 several times to
obtain the best results.
8) Tighten the setting screw again.