This is a light and easy to use set of binoculars that will help you in your navigation during your cruising. The Binoculars Auto 'Sea Nav' SAF 7x50' combine perfectly 7x magnification power, ruby red coating of the objective lens filtering out red light and Porro K9 prisms for brighter images.Additionally, it offers the convenience of the auto-focus, with a wide field of view of 400ft at 1000 yardsIt also features foldable eyecups for those viewing with eyeglasses. Its rugged construction with rubber armouring will protect the binoculars, and offer you a better grip, even when the hands are wet.The Sea Nav SAF 7x50 come complete with strap, pouch and covers for the lenses.