The Celestron 2x Barlow lens with T-Adaptor can be used three ways: as a 2X Barlow for visual use, as a prime focus T-adapter, or as a ""Barlowed"" T-adapter for double the magnification and the benefit of extra inward focus travel. Insert any 1.25"" eyepiece into the chamber and you'll enjoy double the magnification, while retaining all the eye relief of the inserted eyepiece. The Celestron Universal Barlow and T-Adapter can also be used for prime focus photography, which means you use the telescope as a photographic lens.
