Pentax AP 10x30 WP Binoculars (Black) Compact roof and porro prism models that balance small size and premium image quality. These binoculars are easily packable when small size and weight are critical but a high quality image is required. 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. Durable construction includes fiber reinforced polycarbonate designs which combine light weight and rugged styling. The reinforced chassis is extremely rigid, but light enough to carry anywhere. Waterproof and nitrogen-filled (JIS Class 6) to handle the most extreme weather conditions (submersible to 1m).