Which iOptron mounts is the 5kg counterweight compatible with?
This 5 kg counterweight is designed for iOptron mounts that use a 28 mm diameter counterweight shaft. This includes the iEQ45, CEM40, GEM45, CEM60, and CEM70 models. The counterweight has a 28.5 mm inner bore for a proper fit.
How do I know if I need this 5kg iOptron counterweight for my setup?
You need additional counterweights when your telescope and imaging equipment (camera, guide scope, filter wheel) are too heavy for your existing weights to balance. As a general rule, the total counterweight should roughly equal the total weight of your payload. This 5 kg (11 lbs) weight is a standard choice for balancing payloads in the 8-15 lb range.
I have a GEM45 mount and an 8" f/10 Schmidt-Cassegrain. Is one 5kg counterweight enough?
An 8" SCT optical tube typically weighs around 12-14 lbs. The standard counterweight that comes with the GEM45 is often around 11 lbs (5 kg). While a single 5 kg weight might achieve balance if slid to the very end of the shaft, adding a second 5 kg weight allows you to position both closer to the mount's axis. This reduces torque and improves tracking stability, making it a highly recommended configuration.
Can I use this 5kg counterweight on an iOptron SkyGuider Pro?
No. The SkyGuider Pro uses a much smaller 20mm diameter counterweight shaft. This 5kg counterweight has a 28.5 mm bore and will not fit. You must use the counterweight specifically designed for the SkyGuider Pro.
What is the locking mechanism on the iOptron 5kg counterweight?
The counterweight uses a single, large locking screw with an M8 thread. This allows you to firmly secure the weight at any position along the counterweight shaft by hand, without the need for additional tools.
What are the physical dimensions of the iOptron 5kg counterweight?
This counterweight has an outer diameter of 148 mm (5.8") and a height (thickness) of 38 mm (1.5"). The inner bore diameter is 28.5 mm (1.12") to fit on 28mm shafts.
