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.
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.
¾18x MODEL
For this model, maximum 12x digital zoom function is allowed to be enabled. The default setting is <ON>
¾22x 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.
¾18x 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
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