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Styrka designed their 10x42 S7-Series Binocular as an instrument that combines optical performance with rugged construction to give hunters a valuable advantage in all weather and lighting conditions. Styrka employs multiple technologies to produce crisp and clear images with accurate color representation. First, they use extra-low dispersion (ED) glass elements and phase-corrected BAK4 roof prisms. This combination corrects for chromatic aberration for rich and true color rendition. To increase light transmission, and enhance image brightness and contrast, are fully multicoated optics using the proprietary SXL-MAX anti-reflection coatings and dielectric prism coatings. The optical coatings are engineered to maximize light transmission across the entire visible spectrum which further increases the color accuracy, while the prism coatings reduce light loss through them to virtually zero. While its field of view is decreased versus lower power instruments, its 10x magnification gives users the ability to spot game at further distances and pick them out in heavy brush. Larger 42mm objectives gather more light than smaller objectives without making them too large and cumbersome to carry all-day with a full pack of gear.
Complimenting their optical performance are construction details that make it an ideal companion in all weather and conditions. The housing is nitrogen filled to make them fogproof with extreme changes in temperatures, and O-ring sealed to give them an IPX7 rating allowing them to be submerged to a depth of 3.3' for up to 30 minutes. Rugged armoring protects the binocular from drops and impacts while providing a slip-resistant grip - especially in cold and wet weather. A large center focusing wheel enables precise control even while wearing gloves, and tethered objective covers and ocular rainguard ensure that you won't lose them in the field during use.
BAK4 roof prism optical path
Extra-low dispersion (ED) optical glass provides tack-sharp images and enhanced color correction while increasing clarity in low-light conditions
Highly reflective dielectric prism coatings increase contrast and light transmission
Phase-corrected prisms improve image quality and color rendition
Broadband fully multicoated optics with SXL-MAX anti-reflective coatings to increase image brightness, sharpness and contrast with true color rendition across the entire visible spectrum
341' field of view at 1000 yd
Wide 65° apparent angle of view
Use and Handling
Closed bridge configuration
Large ribbed center focus wheel
±3 right-eye dioptric correction
Twist-up rubber eyecups
58-72mm interpupillary distance
17mm long eye relief
4.2mm exit pupil
Rubber armoring provides external protection and a secure grip
IPX7-rated and nitrogen-filled for water and fogproof performance
Submersible to 3.3' for up to 30 minutes
Tethered objective lens covers and ocular rainguard