|
Unguided limit depends on two factors, polar alignment and balance for the direction you're imaging. When I got my CGEM DX years ago a firmware update improved tracking accuracy. I already explained elsewhere on this forum how I got 99.9% perfect polar alignment I could set up each time reliably. But disengaging clutches and manually positioning to your imaging target and balancing the setup at that point always gave me reliably round stars at 30sec exposures. To be honest I never went above that duration and these days due to health cant use it. Initial star alignment would rarely put target stars anywhere in frame but my target where I balanced would always be dead center in my shots. In hindsight it was more gear than my knowledge and skills could make the most of at the time, if anything I let it down. Never had purchase regret, the CGEM DX is built as solid as an anvil. From memory the CGEM uses the same mount but a lighter tripod, which I'd be concerned about vibrations with. No real reason I chose it, I just wanted the scope bundle and was in a hurry to buy at the time.
|