"The Pentax S series binoculars are superior quality full sized binoculars that are ideal for the widest range of lighting and weather conditions. Large objective lenses incorporated in the design allow for contrast-rich, bright viewing under all light conditions. Large Objective Lens Elements Large objective lens elements provide maximum light gathering capabilities and are perfect for use in low light conditions. Premium Multi-Layer Coatings Premium multi-layer coatings assure the maximum light transmission through the binocular. The result is bright, crisp, true-to-life images in the widest range of viewing conditions. Rigid Body Construction Rigid body construction makes these binoculars extremely rugged to maintain optical alignment. This ensures comfortable viewing throughout the life of the product."