The Nikon 7x50 Sports & Marine Compass binoculars are totally waterproof, fogproof and shock resistant to survive in the harsh marine environment. Nikon chose individual focus for the 7x50's eyepieces to eliminate the need for constant focusing when most viewing is at longer distances. Each ocular lens of the Nikon Sports and Marine Binoculars is focused to meet the requirements of the user's eyes, then no further focusing is required. If lent to a mate, the skipper can return the focus to his own settings quickly and easily. The optimum ratio between magnification (7X) and objective lens (50mm) delivers an exit pupil of more than the 7mm that will satisfactorily accommodate the human eye during very low light conditions. The result is maximum light gathering at dawn, dusk or fog when navigation markers must not only be seen, but identified for safe piloting in coastal waters, harbors and inlets. The 7X magnification of the Nikon Sport and Marine Binoculars is the power of choice by mariners for steady viewing on the water. The difference between these glasses and those of lesser quality, Nikon said, is in the optics, for which the company is renowned, and a superb mechanical system that keeps lens perfectly parallel for constant viewing without eye fatigue. The lens surfaces of the model 7443 have Nikon's unsurpassed multi-layered, anti-reflection coatings to transmit the highest possible percentage of ambient light.
- Focusing System: IF
- Magnification x: 7
- Objective Diameter (mm): 50
- Angular Field of View Real: 7
- Angular Field of View Apparent: 49
- FOV at 1000 yds.(ft.): 366
- Close Focus Distance (ft.): 82
- Exit Pupil (mm): 7.1
- Relative Brightness: 50.4
- Eye Relief (mm): 18
- Size (L&W) inches: 7.1x8
- Size (L&W) grams: 181x203
- Weight oz.: 42.7
- Weight grams.: 1210
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