Mobotix D26 Dome Manual page 85

Adjusting Lens Focus and Correcting Lens Distortion
• Once the camera has been aimed, tighten the Allen screws
at both sides of the lens mount (in a clockwise direction) and
the toothed ring (in a clockwise direction) with the supplied
hook wrench. Do not use excessive force when doing so as
this may damage the camera.
• Adjustment: Adjust the image focus by rotating the lens in
its socket. Check the image on the computer monitor. To avoid damaging the lens
mount, never turn the lens too far or with force.
Caution (only for 135 mm Telephoto lens)
Image Focus: Due to the lens effect of the dome, the focus of the 135 mm Telephoto
lens shifts slightly once the dome has been mounted. Before mounting the dome,
the Telephoto lens should be rotated by 90°-120° in a counter-clockwise direction
(against the direction in which the lens is screwed). Make sure that you check the
focus of the live image with the dome installed and re-adjust the lens, if required.
Mount the dome. Use the supplied foil or a lint-free cotton
•
cloth to insert the dome into its seat and turn it in a clockwise
direction. Once again, check the focus of the camera image
on a computer monitor.
If required, gently clean the front of the lens using a soft cot-
ton cloth before installing the dome. Do not apply excessive
pressure to the surface of the glass when cleaning the lens.
5. Attach the rubber seal: Place the rubber seal with the groove
around the edge of the black mounting ring of the camera.
6. Attach the outer shell: Replace the outer shell and screw
all four Allen screws tight using the supplied Allen wrench.
Ensure that the rubber seal is properly positioned.
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