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Old 12-04-2018, 08:04 PM
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Aussie_Dave
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Join Date: Feb 2015
Posts: 136
For Newtonian reflectors like Skywatcher, Saxon etc. Inside diameter seems to be around 288mm.

It sounds like you're needing 8" Newt rings LewisM or there abouts.

http://i68.tinypic.com/2h3c02t.jpg

http://i66.tinypic.com/15db3ep.jpg