The click-stop diopter adjustments allows you to lock in your individual settings, even when the binocular is jostled around. Once you've found what your looking for, focus in quickly with the easy to use center focusing. Fully waterproof, nitrogen filled, submersible to 1 meter. Phase-coated roof prisms for enhanced contrast and sharpest images. Lightweight magnesium frame .
Center focusing instantly brings images into focus.
Rubber slide style eye cups for easy use by eyeglass wearers. Exclusive Super-Multi Coating for increased light transmission. Longer eye-relief provides excellent viewing with or without eyeglasses. Rubber covered exterior for a firm grip and easy handling. 8X or 10X magnification and extra large 42mm diameter objective lens.