The Eagle Eye 20-60 X 80 Mm Spotting Scope Was Designed To Deliver Outstandingâ Optical Quality In An Easy To Use Package. Its 80Mm Objective Lens Has Been Given The Multi-Coating Treatment For Excellent Light Transmission And The Silver-Coated Glass Prisms Reflect Ample Light Back Into The Users Eyes For A Clear And Vibrant Image. The Eagle Scope Also Has A Rotating Ring, Providing The Most Comfortable And Convenient Viewing Angle When Mounted On A Tripod