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I have the cheaper William Optics pair. I love them, they virtually live on my refractor and are great in bigger SCTs, but I can't get them to focus on my 8 inch Skywatcher dob, even with the OCS.
I was wondering about these new Skywatcher dobs, which are collapsible and have extendible poles; if you didn't extend the poles quite so far, then the binoviewers would come to focus (albeit, cutting off a bit of the light cone illuminating the secondary mirror I suppose). Collimation might be tricky, I guess, maybe impossible, what with the weight of the binoviewers and all. I think I asked about all this a while ago, and received a generally negative response, but I've forgotten precisely why people thought it wasn't a good idea. Anyway, if there is any way you can do it, the views are definitely great through a binoviewer.
Cheers,
Brian.
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