|
Your Vixen ED81 will make a fantastic guide scope... I've used pretty much everything..
- 8x50 finderscope
- WO ZS66
- WO ZS70
- Orion ST80
- OAG @ 480mm FL
- OAG @ 2800mm FL
etc. etc.
I've found best results come down to your settings rather than your hardware... Focal length and ratio are not as important as they once used to be, although they are still somewhat scalable, Ie, you probably wouldnt use a 8x50 finder (200mm FL) to guide a 2800mm FL scope as the imaging scope could see massive errors before the guider noticed a movement..
too long a focal length guider brings about its own issues.. namely, not being able to find guide stars.
|