Swarovski Optik SLC HD Binoculars, 10x42mm Fluoride-containing HD lenses for impressive transmission of lifelike, high-contrast images; Optimized SWAROBRIGHT, SWARODUR and SWAROTOP coatings; SWAROCLEAN: non-stick coating makes cleaning particularly easy Large exit pupil distance for increased viewing comfort, especially for spectacle wearers; Wide-angle eyepiece for exceptionally large field of view; Built-in dioptric compensation of +/-4 dpt; Optimized roof-prism system with P-coating 4-lens objective with excellent light-gathering qualities; Precise close range focusing to below 2 m (6.2 ft.) Light, rugged magnesium housing; Easy-to-handle, smooth focusing ring; Patented center focus system allows rapid focusing Dirt-proof, dust-proof and watertight (4 m/13 ft.) on account of interior focusing; Removable twist-in eyecups with interim adjustment stages