Alpen's Wings 20-60x80 Spotting Scope generates brilliant images full of crisp details by combining an impressive 80mm aperture with fully multi-coated optics and a premium prism with dielectric coatings. This scope has a built-in zoom eyepiece angled at a comfortable 45°, a dual focus system that allows for both coarse and fine adjustments, a tripod thread and twist-up eyecups. It is waterproof and purged with nitrogen to prevent distracting internal fogging.