Hey, everyone...
I have a C11 with a sand-cast back. The original owner had a custom ring made for the 2" (I think) male threads on the back to increase the size of it to accommodate a large Crayford focuser. The ring is not removable, as far as I can tell. I would like to be able to use the Celestron f/6.3 focal reducer, but with the modification on this scope I can't thread a reducer onto the back. I am trying to figure out a way to go about this. I need to know the outside diameter of the reducer to even begin. Can anyone provide this information?
Thanks,
Steve
I have a C11 with a sand-cast back. The original owner had a custom ring made for the 2" (I think) male threads on the back to increase the size of it to accommodate a large Crayford focuser. The ring is not removable, as far as I can tell. I would like to be able to use the Celestron f/6.3 focal reducer, but with the modification on this scope I can't thread a reducer onto the back. I am trying to figure out a way to go about this. I need to know the outside diameter of the reducer to even begin. Can anyone provide this information?
Thanks,
Steve
