Auto-Guiding with Video camera
Posted 26 November 2012 - 07:39 PM
Posted 26 November 2012 - 08:29 PM
Posted 27 November 2012 - 10:30 AM
Periodic error range.
Accuracy of polar alignment.
If you have PEC, use it.
Polar align sufficiently well to obtain a drift in Dec of no more than one pixel over your maximum anticipated exposure duration.
Consider a focal reducer, of course. This both reduces image scale, which suppresses tracking errors, and reduces exposure times, which provides fewer chances for tracking errors to accrue.
Even though my Ultima C8 has PEC, I don't have handbox and so cannot 'train' it. Even so, with a Meade f/3.3 reducer installed, most of my 1-minute integrations are fine, with an occasional image showing a little drift in RA.
Posted 27 November 2012 - 01:07 PM
Autoguiding for under 30 seconds is optional imho.
Not that a good mount and alighment cant do it alone,it can,but the cost of autoguiging is cheap compared to a high end mount.