The optical system of the celestron trailseeker 100 straight spotting scope has an xlt multi coating that produces high resolution images with outstanding contrast and sharpness this scope is rugged and durable with a rubber armoured body that is filled with nitrogen to ensure it is waterproof and tough super portable it has a zoom of up to 67x magnification and a 100mm objective design the dual focus mechanism allows you to get subjects in focus quickly and fine tune the adjustments