The Viking Monocular 8 x 42 ED-M is a great, extra-low dispersion glass monocular, carefully designed to provide high quality viewing on all occassions. Such quality is enabled by the Viking Monocular ED's inclusion of phase-coated BAK-4 prisms, vital for producing a level of clarity that is impossible to achieve in other designs. It also features fold down eyecups for spectacle wearers as well as innovative multi-coated optics which prevent internal reflection. The prevention of internal reflection in the Viking Monocular produces a more contrasted image and increases light transmission. An excellent Monocular for all purposes.