Baader M68 to T-2 Conversion Ring This conversion ring is created by Baader for quickly switching an M68 male thread into a T-2 male thread. This conversion ring is a must-have for anyone looking to get started in astro-imaging. The telescope side of the adapter features an M68 thread. The eyepiece side uses a T-2 thread. The ring will add 5mm to your setup. Optical Tube Length: 5 mm Inner Diameter/Clear Aperture: 38 mm Outer Diameter: 65.5 mm Outer Connection (Lens Side): Thread, M68 Inner Connection (Eyepiece/Camera Side): Thread, 2" Outer Connection (Eyepiece/Camera Side): Thread, T-2 (M42 x 0.75) Technical Specifications SKU Number BAD-M68-T2 Model Number M68-T2 Adapter Connector Type - Side A M68 Adapter Connector Type - Side B M42 (T or T2) Adapter or Spacer Length in mm 5 mm Baader Model Number 2458233 Warranty Baader 2 Years In the Box M68 to T-2 Conversion Ring Warranty & Manuals 2-Year Warranty