PENTAX PF-65ED II spotting scope is designed for high-precision outdoor viewing, along with enhanced optical quality which provides truer color tones. With porro-prism optics and a 65mm objective lens with extra-low dispersion optical elements, this scope delivers sharp, high-contrast images. Viewing in inclement weather won't be a problem as the PF-65ED II is waterproof and nitrogen filled (JIS Class 6).