BO40 10x50 Floating Compass Reticle Binoculars
Bring distant detail closer with a 10x50 binocular that feels steady, bright, and satisfying in regular use.
BAK4 prisms and a confidence-inspiring build make it a strong pick for waterfront observation, harbor viewing, and route reference.
Technical Specifications
| Category | Binoculars |
|---|---|
| Magnification | 10x |
| Objective Lens Diameter | 50 mm |
| Eyepiece Diameter | 23 mm |
| Field of View | 109 m at 1000 m / 358 ft at 1000 yds |
| Prism Type | Porro prism |
| Prism Glass | BAK4 |
| Lens Coating | Amber-style optical coating shown in the source graphics |
| Exit Pupil | 5 mm |
| Eye Relief | 15 mm |
| Close Focus | Approx. 4 m |
| Focus System | Independent left and right eyepiece focus |
| Compass Feature | Built-in compass with illumination module |
| Reticle Feature | Built-in reticle scale shown in the viewing examples |
| Weather Protection | Nitrogen-filled waterproof floating body shown |
| Body Material | Magnesium-alloy body with rubber-armored exterior |
| Dimensions | 195 x 90 x 170 mm |
| Weight | 1085 g |
| Included Accessories | Binoculars, objective covers, eyepiece cover, neck strap, carry bag, cleaning cloth, manual, retail box |
| Best For | waterfront observation, harbor viewing, route reference, ferry decks, and long-distance landmark spotting |
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| Category | Binoculars |
|---|---|
| Magnification | 10x |
| Objective Lens Diameter | 50 mm |
| Eyepiece Diameter | 23 mm |
| Field of View | 109 m at 1000 m / 358 ft at 1000 yds |
| Prism Type | Porro prism |
| Prism Glass | BAK4 |
| Lens Coating | Amber-style optical coating shown in the source graphics |
| Exit Pupil | 5 mm |
| Eye Relief | 15 mm |
| Close Focus | Approx. 4 m |
| Focus System | Independent left and right eyepiece focus |
| Compass Feature | Built-in compass with illumination module |
| Reticle Feature | Built-in reticle scale shown in the viewing examples |
| Weather Protection | Nitrogen-filled waterproof floating body shown |
| Body Material | Magnesium-alloy body with rubber-armored exterior |
| Dimensions | 195 x 90 x 170 mm |
| Weight | 1085 g |
| Included Accessories | Binoculars, objective covers, eyepiece cover, neck strap, carry bag, cleaning cloth, manual, retail box |
| Best For | waterfront observation, harbor viewing, route reference, ferry decks, and long-distance landmark spotting |
Bring distant detail closer with a 10x50 binocular that feels steady, bright, and satisfying in regular use.
BAK4 prisms and a confidence-inspiring build make it a strong pick for waterfront observation, harbor viewing, and route reference.
- 10x50 delivers a confident balance of reach, brightness, and everyday usability.
- BAK4 prisms help keep the view clearer, brighter, and more natural.
- Weather-ready construction adds confidence for outdoor carry and changing conditions.
- Built-in field features add useful functionality when you want more than a basic view.
Choose the version that matches how you like to watch
Different variants give you room to match the optic to your routine instead of settling for a one-size-fits-all setup. Whether you want a wider, easier view or a little more reach, the lineup makes it easier to pick the version that feels right in your hands and in the field.

Comfortable handling helps you settle the view faster
Details such as independent left and right eyepiece focus make it easier to get comfortable, dial in focus, and stay with the scene longer. That everyday ease matters because the best optic is the one that feels natural enough to use often.

Extra field features add useful guidance on the water and in open terrain
The built-in ranging and compass functions do more than decorate the body. They add practical orientation and observation support, especially when you are watching coastlines, open water, or broad landscapes where a little extra reference can make the experience feel more capable.

Clear optics make every scene look brighter and more natural
BAK4 prisms work together to keep the image cleaner, with better contrast and a more natural sense of detail. That means you can enjoy a view that feels sharper and more premium from the first glance, whether you are watching wildlife, landmarks, or open landscapes.

Why It Performs in the Field
Expect a brighter, calmer view with the kind of coatings and optical design that make detail easier to catch when the light changes or the distance stretches out.
The shape, balance, and weather-ready build are chosen to feel comfortable in real use, so longer walks, travel days, hides, and shoreline sessions stay enjoyable.

