ZEISS TERRA ED 10x42 BINOCULARS - IDEAL FOR STALKING/DAYLIGHT HUNTING, OUTDOOR/LEISURE, BIRDWATCHING/WILDLIFE OBSERVATION, HIGH SEAT/NIGHT ZEISS Terra ED binoculars are robust, reliable and easy to use. Their state-of-the-art and sleek design makes them not only light but comfortably compact. The highest optical precision and the hydrophobic multicoating guarantee brilliant images down to the very last detail. The Terra ED binoculars are waterproof and nitrogen-filled, making them rough and ready. Terra ED binoculars are excellent value for money, making them the perfect entry into the world of ZEISS. A bright image, outstanding resolution of details and comfortable viewing characteristics. In combination with optimum ease of handling, these perfectly describe the outstanding properties of the Terra ED 42. Performance: Magnification: 10 ? Effective lens diameter: 42 mm Exit pupil diameter: 4.2 mm Twilight factor: 20.5 Field of view at 1,000 m: 110 m (361 ft) Subjective viewing angle: 60 Close focusing distance: 1.6 m (5.3 ft) Diopter adjustment range: ? 3.0 | + 3.0 dpt Exit pupil distance: 14 mm Pupil distance: 58 - 75.5 mm Lens type: ED Prism system: Schmidt-Pechan Features: LotuTec | Nitrogen filled: - | + Water resistance: 100 mbar Physical: Operating temperature: ? 15°C | + 60°C (+ 5°F | + 140°F) Length: 142 mm (5.6") Width at an interpupillary distance of 65 mm: 120 mm (4.7") Weight: 725 g (25.6 oz)