I have just finished my autoguiding setup. Not sure how effective this is but will test it out when the sky clears up.
Ive mounted a 4.5 inch scope ontop of my 8" with another set of 8" tube rings as seen in pics. Will there be any issues with this autoguidng setup? The 8" will be the imaging scope with a DSI II and the 4.5 inch is the gudiing scope with a DSI-C.
The only thing I'd worry about is the size & weight of the guide scope, being a 4.5" newtonian instead of a smaller/lighter refractor of the same focal length. I decided not to use my old 4.5" newtonian as a guidescope on my 12" LX because of it's length & weight. But if your equatorial mount can handle the balance & weight, then I would've thought the focal length will be nice, probably with a barlow involved, maybe not.
Can the guidescope me moved directionaly...it doesn't look like it....sometimes you wont be able to pick up a guide star on the target your imaging.....thats why people use guide rings so their is some adjustment.
Otherwise it will be fine on targets where there are plenty of guidestars.
Cool, you might want to get some various shims to let you shim out the guide scope to a bright enough star until you get rings that let you align easily. then all you do is loosen the rings a smidge and shim out till you find a guide star, or toward a guide star you can see in the guide scope, crude, rough and agricultural, but it works , If it works well you'll want rings though, much, much easier.
As long as your mount can handle the weight it should work fine.
I use a fixed 4.5 inc Newt as a guide scope-and by simply using longer exposures in the guide camera-sometimes up to 2 or 3 sec (very rarely though)-have never ever had a problem with finding a guide star. If you were to use aToUCam incapable of long exposures as a guide camera its another story--you then will most certainly need to adjust the guide scope--but that's not your plan anyway. So I'm certain it will work---as long as the mount can handle it
, If it works well you'll want rings though, much, much easier.
