Sky-Watcher 1.25" 2x Deluxe Barlow lens

This 1.25" Barlow lens from Sky-Watcher gives you an extra 2x magnification for your telescope. The Barlow Lens (named after its inventor, the British mathematician and physicist Peter Barlow) is a diverging (negative) lens, which is used to extend the effective focal length. This results in a higher magnification. The Barlow Lens can be placed between the diagonal and the eyepiece.