Swarovski Optik SLC 10x42 HD Lightweight HD binocular with 10x magnification and 42mm objective lens Fluoride-containing HD optics produce high-contrast, crystal-clear images Swarobright, Swarotop, and Swarodur coatings make subjects stand out in low light Redesigned focusing wheel for easy adjustments; large 16mm exit pupil distances Slender magnesium housing weighs only 28 ounces; 10-year warranty