Orion 08711 Shorty 1.25-Inch 2x Barlow Lens (Black) Double the power of any 1.25" telescope eyepiece with the Orion Shorty Barlow Lens A great way to essentially double the number of telescope eyepieces in your collection, without having to buy twice as many eyepieces! Very compact - just 3 inch long (half the length of a standard Barlow lens) - easy to stash in your accessory case Doublet lens system is multi-coated for excellent transmission and the internal housing is baffled to eliminate unwanted reflections and increase contrast Threaded for use with 1.25 inch Orion telescope eyepiece filters