BARSKA's Blueline Jumbo binocuolars are designed for the rugged demands of field surveillance. Available in two models, both feature roof prism design, two magnifications, all-metal construction, multi-coated optics and individual focus. Model AB10180's rotating ocular lenses provide wide-angle viewing at 25x and high-power viewing at 40x. This model includes a heavy-duty adjustable wood tripod and rugged mount. Model AB10520 features waterproof construction, BAK-4 prisms and fual-power interchangeable 20x and 40x eyepieces. This model performs especially well in low-light conditions.