The small Leica Ultravid Colorline 8x20 Aztec Beige Binoculars in is waterproof roof prisms with phase-correction. Impressive with their extremely convenient size and excellent optical performance. Brighter and sharper than other binocular of this lens size, these compact models are true to the high standard of the Ultravid class. Aspherical lenses ensures that images are large, focused from edge to edge and free of color fringes. The diopter is adjusted with a one touch button. Aqua-Dura coating protects the lens against dirt and water and are waterproof to 16.5 making them ideal for fishing as well.