Posted 22 November 2013 - 04:31 PM
My CG-4 has two counterweights, 8 lb and 4 lb. I recently acquired an 8" SCT which is right at 12 lbs by itself. When dealing with counterweights, is it best to match the weight you have mounted, or is it okay to have more? For example, Celestron only sells 11 lb counterweights for the CG-4 and CG-5. The 11 lb plus my 4 lb would put me at 15 lbs. The SCT with finder and camera ready will likely be 13.5 lbs. Will this cause problems?
Posted 22 November 2013 - 04:55 PM
There is only a problem if there is a large mismatch between counterweights and scope. Even then something like a counterweight shaft extension can sometimes solve the problem without adding more counterweights.
Posted 22 November 2013 - 05:17 PM
Posted 22 November 2013 - 05:23 PM
- Set up mount on the tripod
- attach counterweights near end of the bar
- attach the telescope and accessories
- release the RA clutch to check balance (keep a hand on the scope JUST IN CASE). You will almost certainly need to move the counterweights up the bar (towards the mount) to get a good balance. When properly balanced and the clutch released the scope can be moved with a light touch of a finger!
You also want to have at least a reasonable balance in DEC - to do that you need to shift the scope's position in the dovetail clamp. Gota be careful doing that though of course as you do not want the scope to slip off the mount while adjusting it!