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VIVOTEK
User's Manual - 69
Focus
Focus here refers to the Remote Focus, is applicable to Network Cameras that are
equipped with stepping motor lens. The automated focus adjustment function eliminates
the needs to physically adjust camera focus. In an outdoor deployment consisting of a
large number of cameras, the auto focus function can be very helpful when these cameras
become out of focus after days or weeks of operation. And that can easily result from
the effects of natural forces, e.g., shrink and expand due to a wide range of operating
temperatures and the vibration caused by wind.
Below is the procedure to perform the automated Focus function:
1. Select a Channel (one of the 4 sensors).
2. Select from the bottom of the screen whether you want to perform focus adjustment on
the Full view or within a Custom focus window. You can create a custom window and
click and drag the window to a desired position on screen.
3. You can use the Fully-opened iris checkbox (default) to increase the iris size for a
better focus adjustment result.
4. Click on the Perform auto focus button. When the Full-range scan checkbox is
selected, a full-range scan through the camera's entire focal length can take about 30
to 80 seconds. If not, the auto focus scan will only go through the length where optimal
focus may occur, and that takes about 15 to 20 seconds. In theory, best results of the
auto scan can be acquired when the camera's iris is fully open.
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