16
KCMU000004
06/08/01
BASIC INSTALLATION,
continued
Back-Focus
Adjustment,
continued
3. If a picture is visible, focus on the scene. Open
the lens as wide as possible by placing a welder’s
glass in front of the lens.
4. When the iris is open to the widest point, readjust
the focus for a clear picture. If a clear picture is
not visible, set the focus ring to midrange.
5. Loosen the back-focus lock screw.
Back-focus
Screw
Back-focus
Adjust Ring
6. Adjust the back-focus ring for a clear picture.
7. Tighten the back-focus lock screw.
8. Fine-tune the focus with the focus ring on the
lens.
9. Remove the welder’s glass from the front of the
lens.
10. Adjust the level control of the lens for the best
picture quality.
