About This

• Seamless Magnification Control: A simple twist of the zoom housing adjusts focal length from 7mm to 21mm; Ideal for planetary clusters, lunar details, and deep-sky nebulae observation
• Extended Eye Relief for Eyeglass Users: 16 to 33 mm adjustable eye relief accommodates eyeglass wearers with zero vignetting; Foldable soft-rubber eyecup ensures comfortable viewing at all focal lengths
• Versatile for All Observers: Wide 30 degree to 47 degree apparent field of view adapts to planetary and deep-sky targets. Precision stepless zoom mechanism outperforms fixed focal length eyepieces
• The 2x barlow lens is full metal constructed and precisely CNC machined; 1.25 inch Telescope Eyepiece Extension Tube; It provides extra focuser back travel which is often needed for short range terrestrial viewing or astrophotographic applications
• Double the power of 1.25 inch telescope eyepiece with the telescope barlow lenses for 1.25 inch eyepieces from Celestron; Orion; Sky Watcher; Meade and most brands of telescope