Olivon EXTRA High Resolution Osprey ED 10×42 Binoculars feature Bak4 prisms to optimize light transmission. We use High Density and Extra-Low dispersion (ED) lens elements to deliver the ultimate in resolution and color fidelity resulting in ultra-sharp images from edge-to-edge. Phase Correction Coating enhances resolution and contrast through roof prisms. Nitrogen filled and 100% O-ring sealed prevent moisture, dust, and debris from getting inside the binoculars. Multi-Helicoid eyecup with three click stops allow you to precisely set the eye relief. Lightweight and durable die-cast bodies made of fiber reinforced Polycarbonate including prisms holding housing and encased rugged rubber armored and durable external protection. High Quality leather-like soft carrying case, lens covers, neck strap and lens cleaning cloth included. Black color. Minimum focus of 6.5 ft. Weighs 28.21 ozs.