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Which scope for a focuser stepper motor?
I have a an 8" Newt with a TS-UNCN2 (or very similar) focuser, an ED100 with the Skywatcher dual speed 10:1 focuser, and an ED80 with a single speed Skywatcher focuser. All can have a Rigel Stepper motor added to them but I can really only afford to add a motor to one or maybe two of them. Which one (or two) to choose? They all sit atop an HEQ5 Pro and eventually will have a CMOS camera and filter wheel attached. Upgrading the focusers on the ED scopes would be spending too much I think (and they haven't been a problem), but do wonder if adding a stepper motor to the Skywatcher focusers might be a bit of a waste or whether, conversely, this might improve the focusers to some degree?
Any advice appreciated.
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