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VIVOTEK
Focus
Focus here refers to the Remote Back 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 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.
2. It is recommended to Reset to the default back focus position of the sensor board.
3. You can use the Open iris button to increase the iris size for a better focus adjustment
result.
4. On an initial setup, you can change the zoom factor and roughly make focus using hte
pullers on the lens module.
5. Click to select the Fine-tune focus or the Full-range scan focus buttons. When a full-
range scan 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.
72 - User's Manual
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Focus window
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