In a message dated 03/31/08 13:38:40 Central Daylight Time, mphammick@... writes: Would not the the best of both worlds be a system that allows you to select both the exposure time and the frequency of exposure. That will give you the chance to minimise loss of definition of brighter stars, but also avoid over-correcting the mount.
Bob: The old SBIG ST-4, the SBIG STV (last firmware) and Maxim DL do/did this.
You choose the guiders exposure times and also choose the time between corrections.
I routinely use 2-6 second guider exposures with a STL-11000 and remote guide head and make a correction anywhere from 1 to 10 seconds. This is with an AP1200GTO mount that is very well polar aligned and needs very little correcting.
