Vanguard binoculars represent excellent value yet perform beyond their price point the advanced ed coated glass achieves levels of brightness colour accuracy and sharpness only matched by more expensive binoculars these excellent bird watching binoculars are also suitable for a wide range of viewing applications magnification 10 x objective diameter 42mm prisms bak4 roof waterproof max depth 1 metre viewing angle 65 degrees field of view 114m at 1000m eye relief 165mm