Howie Glatter Parallizer - 2" to 1.25" Eyepiece Adapter 1.25 to 2 eyepiece adapter to use 1.25" eyepieces in 2" holders Ensures precise parallel alignment between drawtube and eyepiece Helps prevents angular misalignment of optics that may degrade image quality Simple to use and seats fully in drawtube without need for a clearance slot