The Steiner Navigator Pro 7×50 Binoculars are exceptional quality and deliver excellent image clarity with sharp definition and contrast. The 50 mmobjective lens diametergives exceptionally bright picture, even in low light.FeaturesHigh-Contrast-Optics – Provide bright, brilliant views, accurate colour and clear images with high contour sharpness for exceptional performanceSports-Auto-Focus – Perfect atonement for on-water use by Sports-Auto-Focus system that lets you focus each eye piece to your vision once, then keeps razor sharp from 20 m to infinity. No more chasing focus on moving targets7X Magnification – Provides wide, stable images for tracking boats, buoys and bridge numbers even in rough waterLegendary ruggedness – Durable polycarbonate Makrolon housing that withstands 11G of impactFloating Prism System – Uses flexible silicon to absorb severe shock, impact and abuse without damageWater Pressure Protection – Up to 5 mNitrogen-Pressure Filled -Nitrogen in the optic protects against fogging up inside at temperature range between – 20C to +60CHydrophobic STEINER Nano-Protection – Clears water from the lenses and repels dirt ,dust and even snow and sleet particlesIn the BoxNavigator Pro 7 x 50CaseCarrying strap