The Leupold BX-4 Range HD Gen 2 TBR/W 10x42mm Rangefinder Binocular (Shadow Gray, MPN: 185699) combines high-performance hunting optics with an advanced ballistic calculation engine. This second-generation platform doubles the effective ranging distance of its predecessor, providing fast and accurate measurements in a rugged, field-ready housing. Built to withstand demanding outdoor conditions, it features Leupold's Elite Optical System for superior light transmission, glare reduction, and resolution from dawn until dusk. Because this unit runs entirely on a single, user-replaceable CR2 Lithium battery delivering over 4,000 actuations, it does not require 240V mains power or Australian AC charging docks. The integrated laser complies with Class 1M eye-safe laser standards, making it fully approved for import and field use throughout Australia.

Key Features:

• True Ballistic Range/Wind (TBR/W): An integrated ballistics engine that calculates precise holdover values. It factors in shot angles, bullet drop across 25 pre-set ballistic groups, and wind drift up to 800 yards.
• Archer's Advantage Mode: Specifically designed for bowhunters to calculate exact shot angles based on arrow weight, velocity, and peep-sight height.
• High-Contrast OLED Display: A bright red in-display reticle provides clear, legible data readouts under various lighting and background conditions.
• Elite Optical System: Extra-low dispersion (ED) objective lenses and premium roof prisms ensure excellent color fidelity, edge-to-edge clarity, and reduced eye strain during prolonged glassing sessions.
• Interchangeable Eyecups: Includes winged, medium, and low eyecups to block stray lateral light, making them comfortable for both glasses wearers and non-wearers.
• Field-Ready Power & Certification: Operating on 3V DC low-voltage power via a CR2 battery, this device requires no standard SAA or RCM electrical safety certifications, making it a reliable, independent option for remote expeditions.

Technical Specifications:

• Magnification: 10x
• Objective Lens Diameter: 42 mm
• Maximum Range (Reflective): 4,000 yards (3,657 m)
• Maximum Range (Trees): 2,000 yards (1,829 m)
• Maximum Range (Deer-sized Game): 1,300 yards (1,189 m)
• Minimum Range: 12 yards (11 m)
• Field of View: 334 feet @ 1000 yards (approximately 111 m @ 1000 m)
• Eye Relief: 17 mm
• Exit Pupil: 4.2 mm
• Dimensions: 5.9" Length x 2.5" Height x 5.1" Width (approximately 150 mm x 63.5 mm x 129.5 mm)
• Weight: 37.0 oz (approx. 1,049 g without battery); 39.0 oz (approx. 1,105 g with battery installed)
• Tripod Compatibility: Built-in 1/4"-20 tripod mounting threads

Who It Is For:

The Leupold BX-4 Range HD Gen 2 is designed for long-range target shooters, bowhunters, and tactical field guides who require a single, streamlined solution for viewing and range finding. Its ability to calculate complex ballistic and windage holds makes it highly valuable for remote Australian hunting environments where carrying separate binoculars and hand-held rangefinders is impractical. It is also well-suited for professional guides and alpine hunters who require dependable operation in extreme temperatures without relying on rechargeable battery packs.