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 43 degree apparent field of view adapts to planetary and deep-sky targets. Precision stepless zoom mechanism outperforms fixed focal length eyepieces
Have a builtin worm focuser with Brass Compression Ring and 2 thumbscrews; 48 mm focusing range about 10 mm focusing range with micro focusing Helical focuser; the rest is by a fixable scaled drawtube is made by an extremely precise focus adjustment
Adjustable aim dovany weight to an astrophotography setup and can conveniently be stashed in an accessory case between uses; Etail guide scope bracket installs on virtually any astrophotography telescope quickly and easily