Make sure your Sport-Cam camera is plugged in to your video camera
or for a larger picture use your television so that you can see what the camera
is viewing.
If you can't see what the camera is viewing you can't screw lens in
correctly to focus it,
Unscrew the lens cover.
Screw the lens in/out slowly whilst watching your monitor / screen /TV or
video camera screen. As soon as you are in focus on an object 6 feet away, replace the lens cover.