The Apertura 2” 2X ED Barlow Lens doubles the magnification of any telescope eyepiece. This Barlow lens is manufactured with Extra-low Dispersion (ED) optical glass and is fully multi-coated to maximize starlight that can reach your eye with exceptional contrast, image quality and sharpness. This is a far superior design to manufacturing with standard optical glass that can actually diminish starlight penetration of the lenses.
With the 1.25” adapter included, the Apertura Barlow lens will fit a 2” focuser and accommodate any 1.25” eyepiece as well. The Barlow lens and the 1.25" adapter both contain a brass compression ring to ensure that the set screws won’t scratch the barrel of the inserted eyepiece. The Barlow is threaded to accept 2" filters and has a removable lens cell.
The lens cell of the Barlow lens may be removed from the Barlow tube and attached directly to a 2" threaded eyepiece; it will then increase the magnification of the eyepiece by approximately 1.5x.