Waterproof binoculars 8x magnification objective lens diameter 42mm fully multi coated optics open bridge magnesium chassis ed extra low dispersion lens glass 81deg angular field of view waterproof fogproof and nitrogren purged 176mm eye relief for more comfortable viewing tripod compatible crystal clear optics an impressively wide field of view and an ergonomic design all qualities which mirror the elegance and performance that come together in the praktica ambassador fx binoculars revealin