The opticron dba oasis s coat 10x42 monocular is designed for the professional wildlife enthusiast and uses the highest quality oasis coated roof prisms with the addition of phase correction coating the unique s type multi coating gives both high clarity and contrast in all light conditions from dusk to dawn the monocular is fully nitrogen gas filled making it waterproof to a depth of 5m close focus to under 3m is possible while the three stage retracting eyecup allows full use for spectacl