For those looking to mount heavier cameras, lenses or telescopes the Star Adventurer counter weight kit is a must. In order to provide smooth tracking and less stress on the mount's motor the counter weight kit allows you to counter balance your payload. With the counter weight kit you can take the Star Adventurer to its maximum payload of 11lbs. For those using heavy full frame camera with popular 200, 300 or 400mm lenses the counter weight kit is a must. NOTE: You must have the Dec. Bracket in order to use the counter weight kit.