iOptron Counterweight for CEM 120 Series Mounts

No, this counterweight is specifically engineered for the CEM 120 series. The bore size and locking mechanism are designed to match the specific shaft diameter and requirements of that mount.

You generally need more counterweight if your telescope payload is heavy enough that you cannot achieve balance with your current weights, or if you are adding heavy accessories like cameras, filter wheels, or guide scopes. If your current weights are positioned at the very end of the shaft and the mount is still front-heavy, it is time to add another weight.

Yes, it includes a secure locking mechanism designed to hold the weight firmly in place on the CEM 120 shaft, preventing it from sliding during slewing or tracking.

Yes, the CEM 120 mount is designed to accommodate multiple counterweights to balance heavier imaging rigs. Just ensure that the total weight does not exceed the maximum payload capacity of your mount.

For optimal tracking, you want your telescope balanced so that it is slightly 'east-heavy' when imaging. This ensures the gears remain engaged and minimizes backlash, leading to smoother, more precise tracking.