Using this Panasonic projector zoom lens is easy. First, make sure your projector is turned off and then carefully attach the lens to the projector according to the markings. When you turn on the projector, you can adjust the zoom to get the right size image based on your throw distance. Keep in mind that the throw ratio of 1.8 - 2.4:1 gives you a good range of options. For maintenance, clean the lens regularly with a soft, dry cloth to keep the image clear. Avoid touching the lens with your fingers as it can leave smudges. If you're not using the lens for a long time, store it in a dry and cool place in its protective case.