{"product_id":"10x42-phase-coated-binoculars","title":"APRESYS S4210 10x42 Phase Coated Binoculars","description":"\u003cp\u003eThe APRESYS S4210 combines professional-grade BaK4 phase-coated optics, a durable magnesium alloy body and ergonomic outdoor handling to deliver bright, sharp and naturally balanced viewing performance for birdwatching, travel and long-range outdoor observation.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eBaK4 phase-coated prism system for improved contrast and image sharpness\u003c\/li\u003e\n\u003cli\u003eBright 10x42 optical configuration for versatile outdoor viewing\u003c\/li\u003e\n\u003cli\u003eMagnesium alloy body with ergonomic anti-slip rubber armor\u003c\/li\u003e\n\u003cli\u003eEnhanced color reproduction with reduced haze and glare\u003c\/li\u003e\n\u003cli\u003eComfortable long-duration observation with reduced eye fatigue\u003c\/li\u003e\n\u003cli\u003eWaterproof outdoor construction for reliable field performance\u003c\/li\u003e\n\u003cli\u003eTwist-up metal eyecups for eyeglass-friendly viewing\u003c\/li\u003e\n\u003cli\u003eFast center focus system with right-eye diopter adjustment\u003c\/li\u003e\n\u003cli\u003eWide field of view for birdwatching and landscape observation\u003c\/li\u003e\n\u003cli\u003eBright and balanced optical performance in changing light conditions\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eBright and Natural Outdoor Viewing Performance\u003c\/h2\u003e\n\u003cp\u003eThe APRESYS S4210 is designed for users who demand clear, comfortable and color-accurate viewing during outdoor observation.\u003c\/p\u003e\n\u003cp\u003eEquipped with a professional BaK4 prism system and advanced phase coatings, the S4210 delivers brighter image transmission, sharper distant detail and improved contrast across the entire field of view.\u003c\/p\u003e\n\u003cp\u003eCompared to standard binocular optics, the phase-coated prism design reduces haze and improves image transparency, producing a cleaner and more immersive viewing experience for birdwatching, wildlife observation and outdoor exploration.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0825\/3161\/4999\/files\/apresys-s4210-10x42-binoculars-outdoor-observation-use.webp?v=1779598582\" alt=\"person using APRESYS S4210 10x42 phase coated binoculars outdoors showing full binocular body and objective lenses during nature observation\"\u003e\u003c\/p\u003e\n\u003ch2\u003ePhase-Coated BaK4 Optics for Improved Clarity\u003c\/h2\u003e\n\u003cp\u003eThe S4210 features high-performance BaK4 prisms with precision phase coatings that enhance optical efficiency and image definition.\u003c\/p\u003e\n\u003cp\u003eThis advanced optical system helps provide:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSharper distant object detail\u003c\/li\u003e\n\u003cli\u003eMore balanced brightness distribution\u003c\/li\u003e\n\u003cli\u003eReduced glare and internal reflections\u003c\/li\u003e\n\u003cli\u003eImproved contrast in complex lighting\u003c\/li\u003e\n\u003cli\u003eCleaner edge definition across the image\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eWhether viewing mountain landscapes, moving wildlife or distant scenery, the S4210 maintains strong visual clarity with minimal softness or optical haze.\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"close-up of APRESYS S4210 10x42 binocular objective lenses showing reflective BaK4 phase-coated optical glass and premium coating detail\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0825\/3161\/4999\/files\/apresys-s4210-bak4-phase-coated-objective-lens-detail.webp?v=1779599305\"\u003e\u003c\/p\u003e\n\u003ch2\u003eTrue-to-Life Color Reproduction\u003c\/h2\u003e\n\u003cp\u003eThe optical coating system is engineered to improve color fidelity and viewing comfort during prolonged observation sessions.\u003c\/p\u003e\n\u003cp\u003eThe result is:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eMore natural color rendering\u003c\/li\u003e\n\u003cli\u003eHigher color saturation without overprocessing\u003c\/li\u003e\n\u003cli\u003eReduced washed-out highlights\u003c\/li\u003e\n\u003cli\u003eBetter shadow detail separation\u003c\/li\u003e\n\u003cli\u003eMore comfortable long-duration viewing\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eFrom forest environments to coastal landscapes, the S4210 produces a vivid and realistic outdoor image with balanced tonal performance.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0825\/3161\/4999\/files\/apresys-s4210-natural-color-reproduction-binocular-view.webp?v=1779600673\" alt=\"natural color reproduction through APRESYS S4210 binoculars showing realistic pebble colors with balanced outdoor optical clarity\"\u003e\u003c\/p\u003e\n\u003ch2\u003eErgonomic Magnesium Alloy Construction\u003c\/h2\u003e\n\u003cp\u003eBuilt with a durable magnesium-aluminum alloy chassis, the S4210 combines structural strength with portable outdoor usability.\u003c\/p\u003e\n\u003cp\u003eThe ergonomic body shape and environmentally friendly rubber armor provide:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSecure anti-slip grip\u003c\/li\u003e\n\u003cli\u003eImproved shock resistance\u003c\/li\u003e\n\u003cli\u003eComfortable handheld operation\u003c\/li\u003e\n\u003cli\u003eReduced hand fatigue during long observation sessions\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe lightweight yet rugged body design makes the binocular highly suitable for hiking, travel and extended field use.\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"person casually carrying APRESYS S4210 10x42 binoculars outdoors showing ergonomic magnesium alloy body and comfortable handheld design\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0825\/3161\/4999\/files\/apresys-s4210-lightweight-binoculars-outdoor-carry.webp?v=1779601709\"\u003e\u003c\/p\u003e\n\u003ch2\u003e10x42 Optical Configuration for Versatile Observation\u003c\/h2\u003e\n\u003cp\u003eThe 10x magnification and 42mm objective lens configuration deliver an excellent balance between viewing power, brightness and portability.\u003c\/p\u003e\n\u003cp\u003eThe S4210 performs exceptionally well for:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eBirdwatching\u003c\/li\u003e\n\u003cli\u003eWildlife observation\u003c\/li\u003e\n\u003cli\u003eNature exploration\u003c\/li\u003e\n\u003cli\u003eOutdoor sports viewing\u003c\/li\u003e\n\u003cli\u003eLandscape observation\u003c\/li\u003e\n\u003cli\u003eTravel and hiking\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eIts 6.1° field of view allows users to track moving subjects while maintaining strong situational awareness outdoors.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0825\/3161\/4999\/files\/apresys-s4210-eyepiece-focus-wheel-detail.webp?v=1779603522\" alt=\"close-up of APRESYS S4210 10x42 binocular eyepieces and focus wheel showing waterproof marking and wide field of view detail\"\u003e\u003c\/p\u003e\n\u003ch2\u003eComfortable Viewing for Extended Use\u003c\/h2\u003e\n\u003cp\u003eDesigned for long-duration observation, the S4210 features 16mm eye relief and metal twist-up eyecups for comfortable viewing with or without eyeglasses.\u003c\/p\u003e\n\u003cp\u003eThe optical system is optimized to reduce visual fatigue by improving image consistency between both eyes and minimizing glare during extended outdoor sessions.\u003c\/p\u003e\n\u003cp\u003eThis creates a more relaxed and immersive observation experience even during all-day field use.\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"APRESYS S4210 binocular metal twist-up eyecups designed for comfortable long-distance viewing with or without eyeglasses\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0825\/3161\/4999\/files\/apresys-s4210-twist-up-metal-eyecups-comfort-viewing.webp?v=1779604166\"\u003e\u003c\/p\u003e\n\u003ch2\u003eWaterproof Outdoor Reliability\u003c\/h2\u003e\n\u003cp\u003eThe S4210 features a waterproof body structure designed for dependable outdoor performance in changing weather conditions.\u003c\/p\u003e\n\u003cp\u003eSuitable for use in:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eLight rain\u003c\/li\u003e\n\u003cli\u003eHumid outdoor environments\u003c\/li\u003e\n\u003cli\u003eForest trails\u003c\/li\u003e\n\u003cli\u003eCoastal conditions\u003c\/li\u003e\n\u003cli\u003eTravel and hiking environments\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eIts sealed optical structure helps maintain stable viewing performance during demanding outdoor activities.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0825\/3161\/4999\/files\/apresys-s4210-waterproof-binoculars-outdoor-rain-test.webp?v=1779604620\" alt=\"APRESYS S4210 10x42 waterproof binoculars exposed to water showing sealed outdoor optical construction and all-weather reliability\"\u003e\u003c\/p\u003e\n\u003ch2\u003eUse Cases\u003c\/h2\u003e\n\u003ch3\u003eBirdwatching and Wildlife Observation\u003c\/h3\u003e\n\u003cp\u003eThe sharp 10x42 optical system and phase-coated prisms provide excellent clarity for observing birds and wildlife at medium to long distances.\u003c\/p\u003e\n\u003ch3\u003eHiking and Outdoor Travel\u003c\/h3\u003e\n\u003cp\u003eThe rugged magnesium alloy body and ergonomic handling make the S4210 highly portable for hiking and outdoor exploration.\u003c\/p\u003e\n\u003ch3\u003eLandscape and Nature Viewing\u003c\/h3\u003e\n\u003cp\u003eBalanced brightness, strong contrast and natural color reproduction create an immersive outdoor viewing experience.\u003c\/p\u003e\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003eS4210\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMagnification\u003c\/td\u003e\n\u003ctd\u003e10x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eObjective Lens Diameter\u003c\/td\u003e\n\u003ctd\u003e42mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eExit Pupil\u003c\/td\u003e\n\u003ctd\u003e4.2mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEye Relief\u003c\/td\u003e\n\u003ctd\u003e16mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrism System\u003c\/td\u003e\n\u003ctd\u003eDAHA BaK4 Phase Coated\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResolution\u003c\/td\u003e\n\u003ctd\u003e6\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNear Focus Distance\u003c\/td\u003e\n\u003ctd\u003eUnder 2m\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrightness\u003c\/td\u003e\n\u003ctd\u003e17.6\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocus System\u003c\/td\u003e\n\u003ctd\u003eCenter Focus + Right Diopter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eField of View\u003c\/td\u003e\n\u003ctd\u003e6.1°\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eField of View @1000yds\u003c\/td\u003e\n\u003ctd\u003e321ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e720g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e127 × 151 × 51mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEyepiece Structure\u003c\/td\u003e\n\u003ctd\u003e3 Groups \/ 4 Lenses\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eObjective Structure\u003c\/td\u003e\n\u003ctd\u003e3 Groups \/ 4 Lenses\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEyecups\u003c\/td\u003e\n\u003ctd\u003eMetal Twist-Up\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWaterproof\u003c\/td\u003e\n\u003ctd\u003e1m–5m\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003eIncluded in the Box\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eAPRESYS S4210 Binoculars\u003c\/li\u003e\n\u003cli\u003eCarrying Case\u003c\/li\u003e\n\u003cli\u003eNeck Strap\u003c\/li\u003e\n\u003cli\u003eUser Manual\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Apresys Optical","offers":[{"title":"10x42","offer_id":53418811916567,"sku":null,"price":139.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0825\/3161\/4999\/files\/apresys-s4210-10x42-phase-coated-binoculars-front-view.webp?v=1779612200","url":"https:\/\/apresysoptical.com\/products\/10x42-phase-coated-binoculars","provider":"Apresys Optical","version":"1.0","type":"link"}