GSO 10" f4 OTA outside diameter?

[graham.hobart (Graham stevens)]

My tube is in storage at the moment but I want to order the CR curved base so I can fit my other Moonlite focuser on to it.
Any one know what size I should order?
My gut tells me it isn't 10'!!
Its the optical tube outside diameter I need, not the mirror size.
Cheers
Graham

[koputai (Jason)]

Hi Graham,

I don't have an OTA, but have the GSO rings for same here. The ID of the rings is 302-303mm.

Cheers,
Jason.

[gbeal]

I don't have one either, but experience with 10" newts (I have one f them) suggests about the 300mm (12") mark. Diameter, not radius. Even if there is a few millimeters difference, it would be close enough for a curved base.
Gary

[graham.hobart (Graham stevens)]

Thanks chaps- I will order the 12"
Graz

[Peter.M]

I ordered the 8 inch version for my old 8 inch newt and it was perfect. I would say in an email that you are fitting it to a 10 inch scope and let him decide what you need