|
Well, thats a good big question Ive often pondered myself.
Having tried those combinations:
AO really sings with bright guide stars, more than mag 5 so you can chase seeing. Suitable brighter than mag 5 stars in just the right guiding spot are rare and definitely require a rotator for composition, you wont just randomly get lucky without a rotator.
Whats left is regular guiding at say 1-3 secs, AO or via mount, same diff exposure/correction speed wise. AO would require less mount moving and be more accurate. Corrections within the AOs span dont suffer PE.
IMO, the MX (set up well) without AO would be preferable for many reasons generally for day to day imaging reliability and convienience, but if you want to produce that once a year rare killer image with lots of planning and patience then AO is the go.
I think thats a bit extreme though and risky. A better plan is to go with an MX and later add AO when funds allow.
|