GSO 1.25" 2x "Shorty" Achromatic Barlow Lens # GS2BL 1.25" 2x achromatic Barlow increases the magnification of each eyepiece and effectively doubles or triples the number of eyepieces in your collection Full unit increases magnification of eyepiece by 2x Barlow element can be separated from main tube and threaded directly into a 1.25" eyepiece for approximately 1.5x increase in magnification Low "Shorty" profile maintains a comfortable viewing position Two-element, fully-multicoated lenses with excellent color correction, sharpness, and image brightness