Bushnell 7x50mm Marine with Illuminated Compass & Rangefinder Reticle Binoculars

Description

These binoculars were built with the mariner in mind!

These Bushnell 7x50 Marine binoculars with compass and range-finding reticle are standard equipment for boating, sailing, hunting, and nearly any outdoor activity. They deliver clear images in even the foulest weather conditions, from fog, rain, and ice to saltwater spray.

They're built to withstand extreme nautical environments and float in them! We suggest you keep them on board, but the 7x50 Marine binoculars are buoyant, waterproof, and corrosion-resistant, so they can take a little dunking. You'll appreciate the ultra-bright, crisp views granted by their multi-coated optics and premium BaK-4 prism glass. Rugged rubber armoring provides a sure grip, absorbs shock, and keeps them from sliding in rough conditions. They're essential equipment if you spend much time on deck, and aren't fazed by a little time off deck. The Bushnell Marine binoculars come with a rugged nylon case and neck strap.

Key Features

• 100% waterproof
• 100% fog-proof
• Sink-proof (they float)
• BaK-4 Porro Prisms for bright, clear, crisp viewing
• Fully multi-coated optics for superior light transmission and brightness
• O-ring sealed and nitrogen-purged to keep out moisture
• Highly resistant to saltwater corrosion
• Non-slip, non-skid rubber armor cushions bumps and shock, prevents sliding, and provides a firm grip when wet
• Hermetically sealed
• Fold-down eyecups

Advanced Nautical Features

The perfect binocular for sailors and outdoor lovers, the Bushnell 7x50 Marine offers a liquid-filled compass built into the viewing optics. Compass swing stops immediately due to advanced damping design, and bearings are marked out in easy-to-read, precise one-degree increments, making the instrument ideal for shipboard navigation or locating objects accurately. A range-finding scale allows the viewer to estimate the range of objects to a known size. 

Using the built-in Compass

The compass is a precision unit. It has extremely fast damping, so there is almost no "swing" and is corrected for dip (Latitude). Compass scale is in one-degree increments and is aligned with the vertical range finding scale. Compass users should always know the local variation between magnetic and true north in order to navigate accurately.  Compass bearings are called out in easy-to-read precise 1 degree increments.  Ideal for shipboard navigation work or locating objects accurately. 

Note: The compass in this binocular is calibrated for use in the northern hemisphere only.  It will not function correctly in the southern hemisphere. 

The compass is illuminated

The Bushnell Marine compass has a built-in LED illuminator for use at night and in low light conditions.  (Incidentally, the compass is built into the left tube of the binocular but the push button control for the light and battery are located in the right tube.  This was done to minimize the chance that electrical interference might affect compass performance.)  When the ambient light does not permit you to see the compass heading clearly, press the button atop the right tube.  If the light is dim or does not come on, replace the batteries.  To change the battery, use a thin coin to remove the battery cover by turning it counter-clockwise.  Remove the two batteries.  The batteries have a (+) on the front and a (-) on the back.  Be sure to insert the new batteries with (+) signs in the same direction.  Replace the battery cover by turning it clockwise.  Uses 2, very standard LR43 battery.   

Using the Rangefinding Reticle Scale

The vertical scale (reticle) visible through the left half of the binocular, above the compass display, allows calculation of distance to an object if its height is known or calculation of height if its distance is known.  Each mark on the vertical scale has a value of 5 MIL (1MIL is equivalent to an angle that can determine an object one meter in height at a distance of 1000 meters). Thus, if a navigation chart gives the height of an object, by sighting on it and counting the number of MILs in the reticle, you can determine its distance. Here are the pertinent formulas:

To measure distance when the height is known:
[Objective Height (m) / Scale Reading] X 1000m = Distance in Meters

To measure object height when the distance is known:
[Distance (m) X Scale Reading] / 1000 = Object Height in Meters

These binoculars feature individual focus eyepieces

Instead of a focus wheel to adjust the binocular, these marine binoculars feature individual focus eyepieces.  Each eyepiece is adjusted for focus.  This is a common feature on Marine binoculars.  The idea is that on a boat, the objects you are viewing are generally always far away.  You can focus the binocular for the main users eyes and basically never adjust them again.  Once focused at infinity, each time you bring them to your eyes they will be focused perfectly.  If you search the top-rated marine binoculars you will find this to be the preferred focusing type. 

Care for your Bushnell binoculars around salt water

After heavy exposure to saltwater or spray, flush the binoculars thoroughly with fresh water and wide dry.  Avoid extended exposure to bright sunlight and severe temperature fluctuations.  For example, if the binocular has been used under very cold conditions, bringing it into a heated environment could cause condensation build up.  While these binocular are waterproof, allow time for gradual change in temperature to keep your binoculars like new for years to come.

About Bushnell
For over 50 years, Bushnell® has been the industry leader in high-performance sports optics and outdoor accessories. Bushnell's dedication to emerging technologies, leading edge design, and performance innovation is what makes it one of the most reputable and recognized companies in the world. Bushnell boasts leading market share in all of the sports optics categories, and their products have consistently won design and performance awards from prestigious organizations.

Bushnell product lines enhance the enjoyment of every outdoor pursuit from spectator sports, nature study, hunting, fishing, and birding to stargazing. Indoors, Bushnell binoculars bring the audience closer to the action in fast-moving sports or the fine arts at theaters and concerts. Bushnell Outdoor Products is the parent company of the following brands: Bushnell, Bolle, Serengeti, Browning Sports Optics, Tasco, Uncle Mike’s, Hoppe’s, Butler Creek, Stoney Point, Blackwater Gear, and Uncle Mikes Law Enforcement.