Axis 2420 W/Lens User Manual page 56

Lenses and Advanced Focusing
56
Plane of Focus
The lens has rotational focus control that allows the focal length of the lens to be adjusted
manually. Depending on the chosen physical location for your camera, it is likely that
several planes of focus will exist throughout the full focusing depth of the unit;
consequently, the Status Indicator is likely to display green - indicating a good level of
focus - several times throughout the full travel of the lens assembly.
Focusing Procedure
Before you begin:
For the focusing algorithm to work efficiently, always ensure that there is minimal movement in the
camera's field of view when focusing, as described below.
With reference to the accompanying illustrations, follow the instructions below to achieve
a good basic level of focus under stable conditions:
Important!
Do not press the Control Button for at least 10 seconds after powering up the unit, as this will cause the
AXIS 2420 to return to its factory default settings.
1. Power up the AXIS 2420 and then wait at least 10 seconds.
2. Turn the lens to its extreme Far-focus (F,
3. Enable the Focus Assistant. Using a suitably
pointed object, press and continue to hold
the Control Button - until the Status
Indicator flashes Yellow.
The Focus Assistant is now enabled with the
Status Indicator set to Focus Mode. The
AXIS 2420 now initiates a focusing
algorithm to regularly calculate the quality
of focus.
4. In order for the Focus Assistant to access the
full focusing range for your application
environment, turn the lens slowly to its
extreme Near-focus (N) position.
AXIS 2420 User's Manual
) position.
Status Indicator
Control Button
Lens Assembly