Pentax designed the 8x42 / 9x42 / 10x42 S-Series SD WP Binocular for a lifetime of rugged outdoor use in all weather and lighting conditions. The 42mm objectives are fully multicoated to reduce reflection and maximise light transmission through the entire optical path. Its roof prisms are phase-corrected to correct for chromatic aberrations ensuring bright and clear high-contrast images with true colour rendition even in low-light. Its general purpose 8x magnification brings subjects close while maintaining a wide 60 angle of view to preserve situational awareness.Complementing the optical performance are construction details made for the trail. The optical tubes are nitrogen-filled and O-ring sealed for fog proof performance and to make them submersible to as much as 3.3'. The binocular sports a generous 21mm eye relief and its twist-up eyecups ensure comfortable viewing with or without eye wear. Protective coatings on the exterior lens surfaces repel water, dirt, and oil to keep them clean for unobstructed viewing.Optical Performance- 8x /9x /10x magnification- 42mm objective lenses- BAK4 roof prism optical path- Phase-corrected prism coatings virtually eliminate chromatic aberrations for increased contrast and true colour rendition- Anti-reflection fully multi coated opticsUse and Handling- Closed bridge configuration- Large knurled centre focus wheel- Right-eye diopter adjustment- Twist-up eyecups for use with our without eye wear- Tripod mountable with optional adapterConstruction- Rubberized armoring protects against impacts and provides slip-resistant grip- Nitrogen-filled, fogproof and submersible to 3.3' (1m)- Internal focusing system helps to maintain waterproof seals- Dust/water/grease repellent coatings keeps the optical surfaces cleanSpecifications:- Prism Type: Roof- Magnification: 8x /9x /10x- Objective Lens Diameter: 42 mm- Angle of View: 7.5 (8x42), 6.1 (9x42), 6.0 (10x42)- Field of View:393.7' @ 1000 yd / 131.2 m @ 1000 m (8x42)320.2' @ 1000 yd / 106.7 m @ 1000 m (9x42)315.0' @ 1000 yd / 105.0 m @ 1000 m (10x42)- Minimum Focus Distance: 53.6' / 16.3 m- Exit Pupil Diameter: 5.2 mm (8x42), 4.7 mm (9x42), 4.2 mm (10x42)- Eye Relief: 21 mm (8x42), 18 mm (9x42), 18 mm (10x42)- Interpupillary Adjustment: Not Specified by Manufacturer- Dioptric Correction: Not Specified by Manufacturer- Focus Type: Center- Tripod Mount: Yes (Adapter Optional)- Dimensions: 5.8 x 5.3 x 2.0 Inches / 14.7 x 13.5 x 5.1 cm- Weight: 22.5 oz / 637.9 g (8x42), 23.5 oz / 666.2 g (9x42), 21.7 oz / 615.20 g (10x42)In the Box:- Pentax 8x /9x /10x 42 S-Series SD WP Binocular- Neck Strap- Carrying Case with Strap- 2 x Objective Lens Caps- 2 x Eyepiece Caps