My answer would be none.... yet.
But it is something firmly on my wish list. (Autoguider)
My biggest hold-back is me. Orion? Or Celestron?
Either way, I plan on the accessories made for the mount I get.
That way, if
any compatibility, or anomalies, crop up, nobody can say "Well, bla, bla, bla..."
That said, I'd be looking at Celestron's guiders for the AVX mount. ;)
StarSense is right in your neighborhood price wise at $319 from B&H. (No sales tax. ;) ) (It matters to ME.)
From what I have read, and I found a bitter pill, these basically set up things, then the scope uses the data base programed in, to zingo the item. Not the autoguider.
Read through
this Celestron page, the FAQ's. 3rd from the bottom peaked my interest. :hunf: Confusing.
Orion specifically states their autoguiders do not work with other mounts. :?:
Hence, why I think I will go with the gear that is undeniably compatible.
I've found in the past that sometimes making "Fruit Salad" with electronics can bring in other compatibility issues. And a lot of frustrations.
I will say this much, and it is a personal choice, granted....
But I, me, myself, will go with a dealer I can leverage if needed. That means no flEaBay for me.
Warranties, though I admit I very rarely need or use them, bring a peace of mind. And Celestron give 2 years.
Yet, Orion sounds like it is a Johnny on the spot with support and repair/replacement, too.
But be aware these come from two different farms.
Now I have a question:
"Can StarSense be used as a guidescope for imaging?
Not currently. StarSenses onboard digital camera does not have enough focal length to accurately guide longer focal length telescopes."Other guide-scopes seem to be compatible with sticking them in an eyepiece holder if I read them right. So wouldn't that magnification enhance them with a narrowed and magnified field of view?
I be thinking I like the off-axis guider option. Kinda makes sense to have your guider looking at the same picture you are.
But of course, I don't know.