I am looking to setup an EAA rig for live stacking at outreach events (I am new to astrophotography). I am leaning toward using an autoguider to maximize the number of usable frames and allow for longer exposures (probably won¡¯t want to go beyond 4 minutes at outreach events). I am considering getting a Losmandy mount for this setup. Based on the datasheets it appears that the GM811 and G11 have better unguided tracking performance than the GM8. Does this translate to significantly better tracking when guided? What would be a typical level of performance for each of these mounts when guided? Is it reasonable to expect sub-arcsecond performance from a guided GM8G?
