When you receive your camera, we already adjusted the focus for the camera to be operational in a general surveillance scenario. For your IN-5907 HD this means, that they give you a sharp image for distances between 5 and 10m. If you need a different focus distance, just turn the camera lense clockwise or counterclockwise, until you have your scene in focus.
I. Please remove the top cover of your IN-5905 HD. Make sure not to lose the plastic ring under the white screw which is for waterproof purpose!
II. Loosen two screws of the back casing and open the casing carefully and make sure not to damage any cables.
III. Remove the three screws (marked in red) which fixes the electronics to the front casing. Attention! Don’t touch the screws with a hexagon mark underneath.
IV. Carefully take out the inner electronics. This part is still wired to the LED board on the front. Please be careful not to damage the cables or the connectors.