Compact waterproof binoculars with roof prisms and easy to use centre focusing WaterProof Hermetically sealed and nitrogen charged, these all weather type binoculars are completely waterproof. Center Focusing System Unlike the individual focusing system used in many conventional waterproof binoculars, the center focusing system is quick and easy to use. The long eye relief makes it comfortable to use, even when wearing eye glasses. Durability The use of high quality aluminium alloy and special rubber covering provides for excellent durability. Limited stock at this special price.