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Rick. Have read that Bintel use GSO bits. If it helps, my 12 inch f5 GSO star tests to show about lambda/7 (wavefront) but it has a little TDE and some minor roughness. Nett result is very good - certainly not perfect, but still nice to look through up to about 500x with my eyes if the seeing allows.
attached image from the scope is a bit seeing affected, but may help.
As others have pointed out, the mechanical construction of these scopes leaves a bit to be desired, but it is good enough as a starting point.
Last edited by Shiraz; 19-12-2012 at 01:46 PM.
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