How to correct the image blur in one corner for ZowieCAM M12 AF?

During shipping or manual focus cabilration, the focus plane of lens may be shift minorly so that it is not parallel to the sensor.

Please prepare a focus test chart first, as shown below:

Log in to the web console of ZowieCam and set the focus mode to auto focus.

Make the focus test chart just fill the screen of ZowieCam and observe the clarity of the four corners.

Gently move the lens in the direction of unclear corners until the four corners are completely clear.