Steiner Navigator Open Hinge 7x 30mm Porro Prism Black Rubber Armor With a compact design and lens diameter of 30mm, this Navigator’s light weight makes it the perfect companion for spontaneous adventures at sea. These characteristics also promise an incredible experience on land. Magnification- 7x Objective- 30mm Field of View- 128 ft @ 1,000 yds Prism Type- Porro Weight- 17.60 oz Finish- Black Rubber Armor Proofs- Fog / Waterproof