Using this Panasonic projector zoom lens is easy. First, connect it to your compatible projector. You can adjust the zoom to get the right image size based on the throw ratio of 1.8 - 2.4:1. For different projection distances, you'll have a clear and well - sized image. When you're done using it, make sure to turn off the projector and lens properly. To keep it in good condition, clean the lens with a soft, dry cloth regularly. Avoid touching the lens with your fingers as it can leave smudges. Store it in a dry and dust - free place when not in use.