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Built on the foundation of the award-winning B.2 binocular, the large objective B.5 features a small/lighter magnesium frame and Abbe-Koenig prism and is paired with the very same fluorite glass that’s featured in our S Series Spotting Scopes. In both 15x and 18x options, the B.5 is our most powerful binocular and the fluorite glass is a step above ED glass of similar-sized optics. One of the most modern optical systems on the market, this purpose-built binocular is designed to extend your range for those who require increased magnification and the ability to discern detail during those critical low-light periods when covering big, open country. The B.5 is our recommended rig for those who are looking to step up their magnification range, but prefer a lightweight system when carrying a spotting scope is out of the question. 
The B.5 also features tack-sharp edge-to-edge clarity, crystal clear glass, considerable eye relief, and a silky focus mechanism.
The Maven B Series represents our elite line of optics, designed to fit your specific needs, delivered for a fraction of comparable binoculars’ costs and stacks up with the most celebrated and expensive binoculars in the world. Whether you choose a stock color unit or configure your own custom-built optic, our modern sportsman-inspired designs are paired with the best available materials and state of the art technology to create an uncompromising optic. 
Includes neoprene neck strap, lens caps and double-layered microfiber storage bag.
-Premium Model
-Size: 8.2 in.
-Weight: 45 oz.
-Fluorite Glass
-Waterproof and Fog Proof
-Fully Multi-Coated Lenses
 -Field Flattening Optical System 
-Exceptionally Clear, Bright, High Contrast Image
-Excellent Color Fidelity
-Tripod Adaptable
-Lifetime Warranty
-Direct to Consumer / No Retail Markup
| Magnification | 10x | 12x | 15x | 18x | 
| Obj. lens diameter | 56mm | 56mm | 56mm | 56mm | 
| Exit pupil | 5.6mm | 4.7mm | 3.7mm | 3.1mm | 
| Field of View (FOV) | 6.5° | 5.5° | 4.5° | 3.7° | 
| Apparent FOV (FOV x Power) | 65° | 66° | 67.5° | 66.6° | 
| Field of view (ft/1000 yds) | 341 | 289 | 236 | 194 | 
| Brightness | 31.4 | 21.8 | 13.9 | 9.6 | 
| Light transmission (%) | 92.80% | 92.60% | 92.50% | 92.70% | 
| Twilight factor | 23.7 | 25.9 | 29 | 31.7 | 
| Multi Position Eyecups Y/N | Yes | Yes | Yes | Yes | 
| Eye relief | 19mm | 17.4mm | 17.8mm | 18mm | 
| Near focus | 9.8ft | 9.8ft | 9.8ft | 9.8ft | 
| Eye width adjustment | 56~75mm | 56~75mm | 56~75mm | 56~75mm | 
| Dimension WxHxD | 6.1x8.2x2.6 | 6.1x8.2x2.6 | 6.1x8.2x2.6 | 6.1x8.2x2.6 | 
| Weight | 45 oz | 45 oz | 45 oz | 45 oz | 
| Lens constr. obj. | 3 groups 4 elements | 3 groups 4 elements | 3 groups 4 elements | 3 groups 4 elements | 
| Lens constr. ocular | 4 groups 5 elements | 4 groups 6 elements | 4 groups 6 elements | 4 groups 6 elements | 
| Prisms type | Abbe-Koenig | Abbe-Koenig | Abbe-Koenig | Abbe-Koenig | 
| Prism reflective coating type | N/A | N/A | N/A | N/A | 
| Phase Correction Coating | Yes | Yes | Yes | Yes | 
| ED glass | Fluorite | Fluorite | Fluorite | Fluorite | 
| Lens coating | Scratch and Oil Resistant | Scratch and Oil Resistant | Scratch and Oil Resistant | Scratch and Oil Resistant | 
| Diopter correction (dpt) | more than +/-2 | more than +/-2 | more than +/-2 | more than +/-2 | 
| Pressure tested to what pressure | 1m for 30 min. (IPX7) | 1m for 30 min. (IPX7) | 1m for 30 min. (IPX7) | 1m for 30 min. (IPX7) | 
| Storage temperature | -40°~158°F | -40°~158°F | -40°~158°F | -40°~158°F | 
| Functional temperature | -13°~140°F | -13°~140°F | -13°~140°F | -13°~140°F | 
| Frame material | Magnesium | Magnesium | Magnesium | Magnesium | 
| Internal gas purged | Nitrogen | Nitrogen | Nitrogen | Nitrogen | 
| Tripod Adaptable Y/N | Yes | Yes | Yes | Yes | 
| Origin | Japanese components assembled in the US | Japanese components assembled in the US | Japanese components assembled in the US | Japanese components assembled in the US | 
