The Offshore series by Tasco is what many seasoned old salts believe to be the best pair of marine binoculars on the market. We happen to agree. The steady 7x magnification and large 50mm objective lenses - the most common size for marine applications - offer excellent resolution and detail even in low light. Quality BaK-4 prisms deliver an extremely bright, clear picture - critical when scanning for navigational markers, other boats or feeding fish. Dry-nitrogenpurged and sealed with o-rings, Offshore binoculars are completely waterproof in both salt- and freshwater. And the ergonomic, porro prism design features a rubber, no-slip grip section making them comfortable to hold and easier to hold on to should the weather get rough.