ASTROSYSTEMS ULTRA LOW DROP-IN EYEPIECE ADAPTER, 2.0" TO 1.25"  SOLVES FOCUSING PROBLEMS W/O MOVING THE MIRROR or shortening the tube.

• --precision made, black anodized
  --2" to 1.25" adapter for 1.25" eyepieces in 2" focuser
  --eliminates need for in-travel on focuser for eyepieces that don't reach focus
  --long length supports eyepiece well
  --smooth exterior barrel doesn't hang up on compression rings or compression ring shoulders
  --NOT threaded for filters
  --nylon-tipped setscrew for no marring.

You can lower the profile of your 1.25" eyepiece up to another 0.5" below the drawtube. The ultra low eyepiece adapter works with any 2.0" focuser. The 1.25" eyepiece position is inset down into the adapter, dropping the eyepiece height 0.5". This allows another 0.5" of focus travel and optimization of the secondary mirror size. The height is compatible with star diagonals and short focusers. Anodized aluminum with nylon tipped set screw. Supplied with hex key to tighten setscrew.
The top internal diameter is 1.9" (48.2mm).
Barrel height (below Lip) 1.25"
Total height 1.3"
If the eyepiece does not fit inside the upper lip, but rests on it, it is still about the thinnest adapter made, so will still provide several millimeters of in-travel compared to most 1.25" adapters.