Explore Scientific EXOS-2/EXOS-2GT Counterweight 9.9 Pounds - Black

A counterweight is essential for balancing the weight of your telescope on a German equatorial mount like the EXOS-2 or EXOS-2GT. Without it, the mount's motors would be heavily strained, leading to poor tracking, inaccurate GoTo slewing, and potential damage to the drive gears.

You need additional counterweights when the standard weights supplied with your mount are not enough to balance a new, heavier telescope or a hefty imaging train (camera, filter wheel, guide scope). If you have to slide your existing counterweight to the very end of the shaft and still can't achieve balance, you need to add more weight.

Almost certainly, yes. An 8" Schmidt-Cassegrain Telescope is significantly heavier than the lighter refractors or smaller Newtonians often sold with the EXOS-2GT. You will likely need this additional counterweight, possibly in addition to the one that came with your mount, to achieve proper balance.

It depends on what came with your mount. Most mounts include at least one counterweight sufficient for a light optical tube. If you can already balance your 80mm refractor with your existing counterweight(s), you do not need another. This item is for when your payload is too heavy for your current counterweight setup.

It is not recommended. Counterweights are designed to fit a specific counterweight shaft diameter. While it might physically fit on another mount, there's no guarantee. This counterweight is designed and threaded specifically for the Explore Scientific EXOS-2 and EXOS-2GT mounts.

A well-balanced mount slews more smoothly and accurately. When the load is balanced, the motors don't have to fight gravity, allowing them to move the telescope to the correct coordinates with greater precision. An unbalanced mount can cause slewing errors and place objects outside the eyepiece's field of view.