[DRL333]

Thanks for your insights into the problem. Just to answer Tak's questions. It is a relatively new scope (GPS) which I purchased second hand. The scope is 18 months old and not heavily used. I did notice some Jitter when I first used it at home but the camera makes the jitter more obvious.

Judging by your answers, 10" of arc jitter is not normal and I need to do something about it.

The gears were tuned for whiplash just after I purchased it by bintel but I don't think they did the PEC

Thanks for your help

Derek