Gskyer EQ 80900 Telescope, German Technology Telescope, Starwatcher Refractors 1.This professional astronomical telescope adopts the optical lens with 99.5% light transmittance, imaging clear and natural which protect the eyes from harm 2.The eyepiece is All-Aluminum Alloy with large diameter and non-dispersive, high quality optical glass-zf4. Lens coated with multi-layer Green film forms a high-power HD imaging 3.Installation is simple and fast without tools. It adopts var control, Smooth tracking and positive image system, which is applicable for both astronomical and terrestrial views 4.The tube of the primary mirror was designed in all-metal. The metal turbine equatorial instrument achieves 360 degrees smooth observation, and it is more durable and sturdy 5.The attachment plate is for quick access to accessories, The bold stainless tripod is sturdy and durable which Height is adjustable to facilitate you better view of stars