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I would use at least 25mm diameter aluminium poles on a 12" scope.
25mm x 1.2mm poles are a lot stronger and will give greater stability at the top end than 20mm x 1.6mm. 25mm x 1.6mm would be the best choice IMO.
My 10"/F5.3 has 20mm poles and in hindsight I wish I specked it with 25mm poles.
Cheers
John B
Last edited by ausastronomer; 02-01-2020 at 11:21 PM.
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