This Canon YH13x7.5K12U zoom lens offers a 13x zoom. However, it's important to note that the auto - focus feature on this unit is non - functional.

Using this Canon zoom lens is easy. Just attach it to your compatible device and start adjusting the zoom as needed. Since the auto - focus doesn't work, you'll have to use manual focus. When focusing, turn the focus ring slowly until you get a clear image. As for maintenance, keep the lens clean. Use a soft, dry cloth to wipe away dust and debris. Avoid touching the lens surface with your fingers as the oils can leave smudges. Store it in a dry and cool place when not in use to prevent damage. Also, be careful when transporting it to avoid any knocks or impacts.