ACTiSYS VER. 061030 CAM-6500 - Manual (Page 56)

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algorithm when zooming automatically. The larger zoom ratio leads the
lower rotation speed.
♦ AUTO CALIBRATION
There are one horizontal and one vertical infrared rays check points in each
dome. When the dome camera position may be moved during installation or
maintenance, the relative distance between the original set point and the
check point has been changed. Enable the Auto Calibration function, the
dome will automatically detect that and reset the point baack to the original
position.
♦ DIGITAL ZOOM
With this item, users can enable or disable the 12x Digital Zoom. The Digital
Zoom activate after the full Optical Zoom level is reached.
¾ 18x MODEL
For this model, maximum 12x digital zoom function is allowed to be enabled.
The default setting is
¾ 22x MODEL / 23x MODEL
For these two models, Digital zoom ration is adjustable from <1> to <12>.
♦ SLOW SHUTTER
The shutter speed determines how long the image sensor is exposed to light.
To see clear image in a dark environment, enable this function and select a
slower shutter speed.
¾ 18x MODEL
As enable this digital slow shutter function, the dome will automatically
adjust the shutter speed basing on the light condition of installation
environment. It enables users to see objects in a dark environment under 0.2
NOTE: The difference between optical and digital zoom is
that optical zoom uses the lens within the camera to draw the
image closer via zoom in or out to achieve the desired effect.
Optical zoom remains the same and the full resolution of the
zoomed image quality. On the other hand, Digital zoom takes
a portion of image and expands that image to the full size of
the image; however the image quality will be reduced.