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This iOptron #8027-05 2.2 kg (5.5 pound) counterweight lets you balance an extra-heavy optical tube and heavy accessory load (such as a photoguide scope, accessory dovetail, mounting rings, and a camera) on a variety of iOptron  computerized go-to equatorial mounts.

These mounts come standard with two 11 pound counterweights suitable to balance payloads up to 25 pounds. Adding one or more of these optional extra counterweights to the mount (and an optional iOptron #8026 counterweight shaft extension, if needed) will let you balance payloads up to 45 pounds. 

The #8027-05 counterweight uses a non-marring compression ring to hold its position on the mount's 28mm (1.1") diameter counterweight shaft. A hand-tighten knob clamps the compression ring to the counterweight shaft to hold the counterweight in place without damaging the finish on the shaft. The counterweight measures 5.05" in diameter and 2.07" in height.

This 2.5 kg (5.5lb) counterweight is designed for following iOptron mount:
  • CEM70/CEM70EC/CEM70G
  • CEM60/CEM60EC
  • GEM45/GEM45EC/GEM40G
  • CEM40/CEM40EC/CEM40G* (for late version with 28mm CW shaft)
  • iEQ45 Pro
  • iEQ45
* Check your CEM40 mount CW shaft diameter before ordering.

Tech Details: 

Weight: 2.5 kg (5.5 lbs.)
Outer diameter: 118 mm (4.6 in.)
Inner diameter: 28.5 mm (1.12 in.)
Height: 25 mm (1 in.)
Locking mechanism: Locking screw with pin
Locking screw thread size: M8

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