Decades of experience make Pentax a leader in selection and quality of binoculars, spotting scopes, and riflescopes. Pentax offers a variety of configurations, magnifications, and styles. Affordable Pentax binoculars offer dual-axis eye-distance adjustment systems, high-refraction glass prisms, fully multi-coated optical elements, and edge-to-edge sharpness in protective rubber housing. Other Pentax binoculars offer nitrogen-filled, waterproof construction, high resolution phase-coated prisms, inner-focus optical design, Helicoids (four click stop) eyepiece rings, and in-line control systems for zooming and focusing. All of the binocular products from Pentax are made with the highest quality optics and mechanics. They're very serious when it comes to the quality of their products, including safety, and work toward meeting all the required standards. They also keep track of the performance of their products to help improve or find potential issues.