[tilbrook@rbe.ne (Justin Tilbrook)]

Originally Posted by troypiggo

If it's this one: http://www.bintel.com.au/Astrophotog...oductview.aspx have you unscrewed the extension part so the EOS adapter screws straight to the glass piece in this photo: http://agenaastro.com/catalog/produc...36/image/5604/

The agenaastro site does mention 70mm back focus. http://agenaastro.com/gso-2-coma-corrector.html

Thanks Troy,

Yep removed the eyepiece extension.

Cheers,

Justin.