Howie Glatter Parallizer 2" to 1.25" Centering Adapter. Unique design will automatically guarantee perfect registration of the eyepiece in the adapter and the adapter in the focuser.  Threaded for 2"(48mm) filters.

• 2" outside diameter
  Threaded for 2" (48mm) filters
  Uniue design guarantees perfection registration of eyepiece in adapter and of adapter in focuser
  For most 1.25" eyepieces, adds 0" of height above focuser top for difficult focus problems

The world's best 2" to 1.25" adapter, with a precision fit and a unique design that automatically registers the eyepiece AND adapter parallel
to the focuser. It adds zero height for most 1.25" filters and is threaded for 2" (48mm) filters, and it's long enough eyepieces can't hit the filters.