Pentax SP 8x40 BinocularsThe Pentax SP 8x40 binoculars feature larger objective lenses which are designed for astronomical as well as terrestrial use. The 40mm lenses are fully multi coated with anti reflective properties that also gather more and improve light transmission and boast an impressive 430' field of view to observe vast landscapes. With the porro prism configuration you get a richer depth of view as well as more surface area for a comfortable grip. The 8x