Multilayer Coating,The Transmittance Exceeds 90%,Effectively Eliminate Stray Light And Improve The Transmittance.Observation At Dusk Or Night Can Also Maintain Transparency And Color Reproduction.large 50mm Objective Lens,The Larger The Exit Pupil Diameter And The Larger The Effective Light-passing Area,The Higher The Brightness Of The Field Of View Obtained,Which Can Ensure Sufficient Light Flux Even When Observed Under Dim Light Conditions.humanized Pupil Design,The Pupil Distance Range Of The Telescope Is 60-70mm,Which Is Generally Suitable For Most People.Compass Positioning,Differentiation And Distance Measurement,Ingenious Craftsmanship,Complete Functions,Built-in Mechanical Compass,Measuring The Position According To The Deviation Of The Geomagnetic Field,Highly Accurate,And The Error Does Not Exceed 2.anti-Skid All-inclusive Rubber Decorative Leather,Wear-resistant And Non-slip High-quality All-inclusive Rubber Decorative Leather,Increase The Stability And Safety Of The Whole Machine,And Enhance The Feel And Service Life Of The Telescope.