The Vanguard 10x42 Spirit ED Binocular is their lightest roof prism model with fully multicoated ED glass lenses. The rubber armored housing comes in at an impressive ~1.3 lbs (600g), but doesn't skimp at all upon the optics. This is the choice for someone who values low weight and high optical quality over a more metal-based housing which weighs more but can be knocked around a bit.
Unlike a hunter's binocular, Vanguard has given the Spirit multicoatings which target the green color spectrum, for enhanced nature observation. The waterproof and fogproof Spirit has moisture-dispersing external coatings which help to shed precipitation quickly.
As a 10x42, this Spirit binocular provides a high degree of magnification in a relatively compact device. The 6° viewing angle is comfortably wide enough for distant scanning of shorebirds and unapproachable wildlife, and the eye relief of 16mm allows most users a view of the binocular's entire field.
Fully multicoated ED glass lenses with Emerald coatings to render full spectrum of color within green tones (essential for nature observation)
HydroGuard external hydrophobic coating upon objectives allows easier cleaning, dust/dirt resistance, and better observation in wet weather conditions
V-Max Silver coating upon P2 phase-coated BaK4 prisms for high reflectivity
Twist-up eyecups simplify sharing unit
Rubber-armored lightweight housing
Discreet dark green finish innocuous to birds and most wildlife