New to this forum but this seems to be a good place to get some decent info on astronomy equipment. Been doing amatuer veiwing for 20 years but within the last year have tried to move more into imaging. Added a Atik Infinity to my old 8 " LX200 GPS and liked some of the initial results. However the more I played with it I found the images were distorted to the edge of the field, and the 13-14 year old fork mount had a 2 or 3 second fast periodic error (making oval stars) I could not get rid of. So I decided to upgrade.
Recently I purchased an Ioptron CEM60 with a Celestron 925 EdgeHD and have only spent 3 partial nights with the equipment. Operation seems straightforward with easy rough polar alignment and finding objects is a breeze.
However, this setup seems to have some vibration issues I am trying to figure out. In the daylight I noticed that just touching to scope seems to make it wobble for quite a few seconds. My permanent pier is anchored into the ground with a 6 foot piece of railroad track surrounded by concrete. The pier is inside a 6x8 foot SkyShed with roll off roof. So the pier base is super solid and mostly shielded from minor wind gusts. When using the Luminos 23 mm eyepiece that was included the visual image is pretty good. However, the slightest tap makes a star wobble around in circles and doesn't completely disappear for over ten seconds.
When using a 15 mm eyepiece, there seems to be a lot of distortion. Star images seem like they are always oscillating in all directions to some degree. Every minute or two brights stars seem to increase in size for a few seconds and then shrink, like a larger vibration pattern which then dampens, perhaps due to wind or atmosphere? Carefully balancing payload and counterweight and using the mirror locks reduced this somewhat but I still am not satisfied. Even turning off the scope does not appear to resolve the problem. Have not even attempted imaging yet.
I contacted Ioptron and did not get any satisfactory answers. They asked if I was near some moving trains (no) and to try it for a few more sessions. I have read some forum posts with some having bad experiences with this mount while others are very satisfied. There are comments about what tripod to use and have heard some stuff about RA belt tension.
Any feedback would be appreciated. Not sure if this is mount, scope or me. The new scope out of the box appears very well collimated.