I want to install/use a QHY Polemaster with my Astro-Physics Mach1 GTO. Does anyone know which adapter will fit and work with my Mach1? I see one that is made for AP 900 and 1100, will that work? Thanks
QHY Polemaster adapter compatibility with Astro-Physics Mach1 GTO
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Tom Bash · Apr 24, 2026 at 04:05 PM
I use this - it’s mount agnostic:
Tom, thank you. Wonder if the distance from the dovetail bar to the “center” of the mount makes any difference? I see other mounts attach directly to the Mach1 RA axis.
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Hi Jeff,
The Polemaster works even when there is a fairly large distance from the center of the RA axis to the dovetail bar. After all, rotation of the RA axis allows the software to project the RA axis onto the sky, from which it calculates the offset from true North, since it knows where Polaris is. I’ve used it on different mounts and always achieved extremely good polar alignment.
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