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I use mine for 918mm fl and I wouldnt be without it.
I have 2 different sbig adaptive optics units. I have an a08 and a aol.
The ao8 is used on a cheap mount and I get pinpoint performance from a cheap mount and Im really happy with its performance. The aol is mounted on a 12.5rc, 2100 fl with a moag. This system is still in the commissioning stage.
David was quoting Greg Terrance from fli when he said it was a super guider. It was a dissmissive comment, as fli did not think it was worth developing, and I have reason to believe fli's position on ao maybe changing.
Think of ao this way;
If you can get a good guide star, you can really chase the seeing with hi speed guiding and have up 30 corrections per second. Sweet.
If you cannot get a bright guide star and have to use a slow correction (say over a second) you are still better off with ao. Why?
Conventional guiding means throwing around the mass of your mount, telescope, camera et al to try and correct for errors. When using the ao even at the same guide rate, you are only moving a few grams of an optic to make the same corrections, and bypassing the oscillations, gear issues etc involved with conventional guiding.
Is AO worth it? I think so.
Brett
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