Maven B4 10x56

• 56 mm objective lenses: the large front lenses gather more light at dawn, dusk, and in deep cover, helping the image stay brighter when smaller hunting binoculars begin to lose detail.
• Abbe/Koenig roof prisms: this prism design supports strong light transmission and a natural, high-contrast view, which is especially useful when glassing dark timber, shaded slopes, or distant animals in poor light.
• 10x magnification with a wide 117.25 m/1000m field of view: this balance gives enough reach for open-country observation while still making it easier to scan terrain and pick up movement quickly.
• Open-bridge polymer body: the shape gives a secure one-handed hold and easier handling with gloves, while the polymer construction keeps the binocular practical for long sessions in the field.
• Nitrogen-filled waterproof and fogproof construction: the sealed housing resists internal fogging and weather exposure, so the binocular remains dependable through rain, cold mornings, and rapid temperature changes.

About the Maven B4 Series

The Maven B4 Series sits within Maven’s high-performance B Series and is built for users who want strong low-light capability from a full-size hunting binocular. The series is offered in 10x56 and 12x56 configurations, giving hunters and wildlife observers a choice between a wider, steadier view or more reach for longer-distance glassing. Maven uses Abbe–König prisms and ED glass in the B.4 design, a combination aimed at preserving brightness, contrast, and color fidelity when light is limited.

The B.4 objective system uses three groups and four elements, and the series is designed around practical field durability as much as optical performance. These binoculars are nitrogen-purged, rated IPX7 for immersion in 1 meter of water for 30 minutes, and built with adjustable eyecups and tripod adaptability for longer observation sessions. Maven positions the B.4 as a serious low-light binocular in the B Series range, with Japanese-produced glass and Japanese components assembled in the United States. In use, the series is defined by its emphasis on brightness, stable handling, and the kind of optical efficiency that matters most during the first and last minutes of legal light.

About the Maven B4 10x56

The Maven B4 10x56 is configured for hunters and observers who spend long periods glassing in low light and want a binocular that favors image brightness without giving up practical field use. Its 10x magnification is a versatile choice for woodland edges, open fields, and mixed terrain because it offers enough reach for evaluating distant animals while remaining easier to hold steady than higher-powered alternatives. Combined with the 56.00 mm objective lenses and a 5.60 mm exit pupil, it delivers the kind of relaxed, bright view that helps when detail must be picked out at dawn or dusk.

The optical layout uses Abbe/Koenig roof prisms and fully multicoated lenses, with a stated 93.7 % light transmission. In practical terms, that supports strong contrast and good image brightness in the conditions where a 10x56 binocular is most often chosen. The 117.25 m/1000m field of view is broad for this class, making it easier to scan hillsides and follow movement without feeling overly restricted. A 17.00 mm eye relief also helps eyeglass wearers maintain a full image more comfortably.

Mechanically, the binocular is built around an open-bridge body with central focusing and right-eye diopter adjustment. That layout gives secure handling, straightforward focusing, and quick fine-tuning to the user’s eyesight. The waterproof, fogproof, nitrogen-filled construction and tripod adaptability make it well suited to long glassing sessions in changing weather, while the 2.90 m close focus keeps it useful for shorter-range observation as well.

About Maven

Maven Outdoor Equipment Company was founded in 2013 in Lander, Wyoming. The company focuses on binoculars, spotting scopes, riflescopes, rangefinders, and monoculars, and it is known for a direct-to-consumer approach rather than a traditional retail distribution model. For its premium lines, Maven uses Japanese components, with B and S Series optics assembled in a military-standard facility in San Diego and then inspected and tested for quality assurance at its Lander headquarters.

Within Maven’s lineup, the B and S Series represent the company’s more performance-focused optics, while other families broaden the range across different uses and price levels. That structure is relevant here because the B4 belongs to the part of the catalog where Maven emphasizes higher-grade optical systems, careful quality control, and field-oriented design. The company’s reputation in sport optics is closely tied to practical hunting and observation equipment built around clear product segmentation and straightforward mechanical design.

Main Features

• Magnification: 10.00 x
• Objective lens diameter: 56.00 mm
• Prism type: Roof - Abbe/Koenig
• Field of view: 117.25 m/1000m
• Field of view (angular): 6.70 °
• Apparent field of view: 67.00 °
• Exit pupil: 5.60 mm
• Eye relief: 17.00 mm
• Close focus: 2.90 m
• Diopter range: -2.0 / +2.0 dpt
• Lens coating: Fully Multicoated
• Light transmission: 93.7 %
• Focusing system: Central
• Diopter setting position: Right eye-piece
• Interpupillary distance: 56.00 mm - 74.00 mm
• Body type: Open bridge
• Housing material: Polymer
• Length: 208.00 mm
• Width: 155.00 mm
• Height: 68.00 mm
• Weight: 1360.00 g
• Working temperature range: - 25°C / +60°C
• Gas filling: Nitrogen
• Waterproof: Yes
• Fogproof: Yes
• Tripod adaptable: Yes
• Made in: Japan

Warranty

10 years. Maven B4 10x56 binoculars are covered by a 10-year warranty, making the product suitable for regular field use over the long term.