The Televue-NP101 is one telescope that can do it all! The NP-101 features unsurpassed optics, with a flat field for ultimate wide-angle views and wide-field astrophotos. The Tele Vue-NP101(Nagler/Petzval) represents Televue's closest realisation yet of the ideal multi-purpose photo/visual telescope. Its snap-to-focus sharpness across even the widest true fields and rich planetary contrast will take your breath away. Its quality, easy set-up, and airline portability beckons your use. Over 20 years ago we reinterpreted the incredible design flexibility of the Petzval portrait lens into an astronomical objective. No other design type affords the freedom to simultaneously correct for: coma, astigmatism, field curvature, secondary spectrum, spherical aberration, and spherochromatism. The artful combination of materials and design bestows the Tele Vue-NP101 with diffraction limited performance into the furthest reaches of the visual spectrum. Sky and Telescope had this to say about the optics of the NP101, Great optics are easy to evaluate - the NP 101 showed no sign of any aberrations, period. End of review! Manufacturing advances in lens finishing, including interferometric monitoring of all surfaces, and Tele Vue's stringent assembly and quality control, insure uniformly excellent results with every telescope, and a level of service all too rare. If your interests range from terrestrial to rich-field or planetary astronomy, or to photography, just put in your eyepiece or attach a camera and the NP101 is ready to satisfy right out of its case. Specifications: - 101mm f/5.4 Apochromatic Refractor - Nagler/Petzval design incorporating full aperture doublet (front) and sub aperture doublet (rear) - Focal length: 540mm - Weight: 4.9kg - Max visual field: 4.9 Supplied with: Custom Hardshell case, screw-on lens cover sliding dew shield, 2 inches focuser, 2 inches Everbrite diagonal, 1 1/4 inches adapter Ring Mount with (3) 1/4-20 holes and easy balance adjustment. Ivory powdercoat finish