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
With this 90-degree erecting prism transform your telescope into a telescope for nature observation with upright and left-right corrected image
This is a great diagonal for daytime terrestrial use and night time astronomy applications for telescopes or spotting scopes;filter thread for any 1.25 inch filter and accepts standard 1.25 inch eyepieces