The IN-8401 2k+ WQHD standard lense has a depth of field that is adjusted to a distance of approx. 5 - 8m. In case your area of interest is out of focus, you will have to adjust the lense accordingly.
By turning the lense to the left or right, you can adjust the focus to the desired area. Connect the power adapter and the network cable of the camera. Open the web interface and use the supplied tool to rotate the lense until you get a clear, sharp image.