Celestron Omni 2x Barlow Lens.

• Double the magnification of each eyepiece you own with the Omni 2X Barlow Lens
• Keep the eye relief of your eyepieces while getting 2X the power
• Slides into 1.25” focusers and diagonals and accepts 1.25” eyepieces
• Fully multi-coated optics with blackened edges for good light transmission and minimal reflections