ZEISS SFL (SmartFocus Lightweight) Binoculars feature down-sized dimensions to put proven German craftsmanship and clarity in the palm of your hand, literally. At just 4.5 inch wide (at 65mm interpupillary distance) and 5.7 inch long, they tuck neatly into a coat pocket or pack, but the optimized ergonomics and large exit pupil make them extremely easy to focus and use. Image quality is, as usual, best in class. ZEISS UHD ultra-high-def glass produces 90% to-the-eye light transmission for excellent target resolution and exceptional clarity in all light conditions-even twilight. The T* 6-layer light transmission coating guarantees maximum color rendition and image brightness-so the views are always vivid, colorful and true to life. And because the weather isn't always ideal, ZEISS outfitted the SFP with their innovative LotuTec coating, which enables a clear and unhindered view in all weather conditions, rain included. Thanks to its SmartFocus Concept, the focus wheel is perfectly positioned and enables fast and precise focusing-even with gloves on. And with a field of view of up to 345 feet and a close focus distance of 4.9 feet, the SFL delivers a perfect wide-angle overview combined with precise detail recognition. If you need to travel light but you don't want to sacrifice optical quality, the slim and lightweight ZEISS SFL Binoculars are the clear choice. UHD glass produces 90% to-the-eye light transmission for excellent target resolution and exceptional clarity Premium Schmidt-Pechan prism system T* 6-layer light transmission coating for maximum color rendition and image brightness LotuTec coating provides clear views in all weather, even rain Lightweight-yet-rugged magnesium alloy housing SmartFocus focus wheel is perfectly positioned for fast and precise focusing, even when wearing gloves Large exit pupil for a relaxed and undisturbed viewing experience Nitrogen purged for fog and waterproof protection Twilight factor: 20.0