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VIVOTEK
56 - User's Manual
Focus
Focus, also known as 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 Zoom and Focus function:
1. Use the Zoom slide bar to find an
optimal view of the area of interest
where you want to adjust its focus. Click
and drag the double-triangle pointer
to rapidly adjust the zoom ratio. The
Focus pointer moves with the Zoom
pointer correspondingly.
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. Click to select the Full-range scan and/or the Fully-open iris checkboxes. When
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. The iris fully open
checkbox is selected by default.
4. Click on the Perform auto focus button, and wait for the scan to complete.
5. After a short while, the clearest image obtained should be displayed and the optimal
focus range achieved. Use the arrow marks on the sides to ne-tune the focus if you are
not satised with the results.
The methodology of using the Resize Buttons at the upper left corner of the streaming
window is the same as that on the home page.