Focus T2/Barlow 2x 1,25 Adapter - The Focus T2 Barlow adapter is made of one piece cnc made aluminium and has a fully multi coated lens for best optical performance. Lenses consist of achromatic lenses to minimize chromatic aberation and to give the user the best wieving experience. This 1.25" accessory 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. The Universal Barlow & T-Adapter can be used as a 2X Barlow right out of the box. 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. Focus T2 Barlow & T-Adapter can also be used for prime focus photography, which means you use the telescope as a photographic lens---a very big photographic lens! Just unscrew the bottom section of the unit to remove the Barlow and slide the chrome barrel into the telesco