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state in the memory, and they can be invoked rapidly when they are in need to adjust
PTZ unit and camera to the position. The operator can save and invoke preset points
through control equipment such as control keyboard and IR controller conveniently
and rapidly. The ball camera supports 255 preset points.
6. Control of lens
(1) Control of focus
The user can acquire a required panoramic picture or its miniature view by
adjusting length of focus through control keyboard or main matrix unit of the ball
camera.
(2) Control of focusing
In case of automatic focusing and zoom by default, lens of the camera will
focus automatically on the center of the scene and maintain a clear image. In a special
circumstance, the user can focus manually and acquire an expected image effect.
In case of manual focusing state, to resume automatic focusing, just swing the
rocker to resume automatic focusing. Apart from this, a special control command can
be issued or any preset point can be invoked to resume automatic focusing.
Lens of the camera cannot perform automatic focusing of the photographing
target in the following circumstances:
a. The target is not in the center of the picture.
b. The target is both in a far place and a near place;
c. The target is an object of strong light, such as luminous object like neon light
and spotlight;
d. The target is behind a glass with water beads or dust;
e. The target moves too quickly;
f. The target of large area, such as a wall;
g. The target is too dark or dim.
7. Control of IR intensity
The user can adjust IR intensity (valid for OSD IR model) manually through
aperture of control keyboard (for IRIS) upward or downward.
8. Automatic backlight compensation
When the function of backlight compensation is enabled, lens of the camera
