View Single Post
Old 20-08-2009, 08:48 AM
g__day's Avatar
g__day (Matthew)
Tech Guru

g__day is offline
Join Date: Dec 2005
Location: Sydney
Posts: 2,564
On the focus side - I use a Bhatinov mask - first get the main camera perfect on a bright star, then zoom on Jupiter in the guide camera, take long duration shots and adjust only your guider's focus in the OAG.

Jupiter is large enough to give a differaction pattern in PHD for me.

In those guided shots I posted - tracking and is better than +/- 3 arc seconds for well over several hours - so it is achievable.
Reply With Quote