Bushnell 1.25" Format 2x Barlow Lens 78-0105 This high quality 2x Barlow Lens effectively doubles the magnification of any eyepiece in a way that eliminates the distortion and other negative effects of using extremely short focal length eyepieces. A 2x Barlow lens doubles the magnifying power of your eyepiece by doubling its effective focal length. For example, an 20mm eyepiece used with a 2x Barlow lens would have the magnifying power of a 10mm eyepiece.

Bushnell 1.25" Format 2x Barlow Lens 780105 Rating & Reviews