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The 7x50 Marine is an economical a high-performance German-made boating binocular made by Steiner. Steiner optics deliver better than 90% light transmission, and the 7x50 Marine features Steiner's revolutionary Sports Auto Focus system, which once set to the user's individual eyesight allows observations from 60' (18.3m) to infinity without the need for focus readjustment. Eye relief is a lengthy 22mm for comfortable extended observations even with eyeglasses.
The 7x50 Marine is nitrogen filled and externally sealed, and guaranteed to withstand bombardment from water jets at multiple angles for five minutes without leaking. It is also tested to withstand a 30°F temperature change without internal fogging. It is defined by Steiner as 'commercially waterproof'.
BaK-4 Porro prisms
Nitrogen purged & O-ring sealed waterproof and fogproof performance
Tough rubber armored exterior with ridged surfaces