100% new used on land and sky viewing in science and travel for beginners, kids, stargazers and travelers;Aperture: 70 mm (2.8), focal length: 400 mm, focal ratio: F/5.7, rack-and-pinion, focuser and low (25 mm) and high (10 mm);Multilayer glass green coated optics for enhanced image brightness protect your eyes;We will do our best to solve your any problems and provide you the best customer services;We will provide the best service and reliable products to our every customer and best quality at this reasonable price, please ease to use