The SFL 8x40 and SFL 10x40 Binoculars are the perfect companion for your next outdoor adventure, from hunting, to hiking, to birdwatching. The SFL's optical was specifically devoted to provide optimal compactness and weight reduction. This is evident in a reduced lens diameter, thinner lens elements, and reduced distance between the lens elements. The SFL's lightweight and small size are perfectly complimented by its flawless ergonomics. This remarkable ease-of-use can be attributed to the SmartFocus Concept, which optimally positions the large focus wheel to eliminate the over-stretching of the user's focusing finger to provide quick and precise adjustments. The combination of reduced weight, smaller size, and excellent ergonomics makes the SFL series perfect for extended glassing sessions and other periods of long observation. Other features of the SFL series includes the UHD or Ultra-High-Definition concept. UHD incorporates advanced lens coatings and a sophisticated optical design to deliver an image with natural color, nearly zero optical aberrations or color fringes, and an impressive light transmission of 90%. Features of the SFL Binoculars: Available in 8x40 and 10x40 Lightweight optical design Ergonomic SmartFocus Concept Ultra-High-Definition Concept