Description: This 1.25" 3x achromatic ED barlow lens effectively triples the magnification of each eyepiece. This barlow uses two-element, fully-multicoated ED lenses with blackened edges to maintain excellent color correction and sharpness. Barlow element can be separated from main tube and threaded directly into a 1.25" eyepiece for approximately 1.5x increase in magnification The Barlow lens ´ role is not only to improve the image quality, but also viewing comfortably. Works with most telescopes that have a 1.25" focuser. Specification: Interface: 1.25 inch (31.7mm) Lens Coating: Two-element, Fully-multicoated ED Lenses Magnification Factor: 3X Material: Metal + Optical glass Color: Silver and Black Weight: 130g/4.6oz Package Includes: 1 Piece 3X Barlow Lens for Telescope Eyepiece