Leupold BX-4 Range HD Gen 2 TBR/W 12x50 Rangefinder Binoculars - Shadow Gray, 185700

The Leupold BX-4 Range HD Gen 2 TBR/W 12x50 Rangefinding Binoculars, 185700 combine powerful 12x magnification, premium HD optical performance, and advanced laser ranging technology for hunters who need to locate game and determine accurate distances across open terrain. Featuring Leupold's Elite Optical System, True Ballistic Range/Wind (TBR/W) technology, and an integrated DNA ranging engine, these binoculars are designed for serious western hunters and long-range shooters who demand dependable performance in challenging conditions.

With a maximum ranging capability of 4,000 yards on reflective targets, 2,200 yards on trees, and 1,500 yards on deer-sized targets, the BX-4 Range HD Gen 2 12x50 provides the reach needed for expansive landscapes and mountainous terrain. The 50mm objective lenses and Elite Optical System deliver excellent light transmission, edge-to-edge HD clarity, and glare reduction, while the high-contrast red OLED display makes ranging information easy to read in changing light conditions.

Designed for hunters who want to combine powerful binoculars and a precision laser rangefinder into one device, the BX-4 Range HD Gen 2 includes TBR/W ballistic calculations, Archer's Advantage technology, customizable Form-Fit eyecups, and a programmable power button. Its waterproof and fogproof construction, tripod compatibility, and ergonomic design make it a capable choice for extended glassing sessions, steep-angle hunting, and long-distance observation.

Explore our complete selection of Leupold binoculars to compare magnification ranges, optical systems, and rangefinding configurations for different hunting applications.

Best Uses

• Western big-game hunting where extended glassing distances and accurate ranging are essential
• Elk, mule deer, and antelope hunting across open country and mountainous terrain
• Long-range rifle hunting requiring ballistic angle compensation and wind-hold information
• Spot-and-stalk hunting where identifying and ranging distant game with one optic is beneficial
• Extended tripod-mounted glassing sessions when additional magnification helps reveal distant details
• Bowhunting in steep terrain using Archer's Advantage angle-compensated ranging technology
• Hunters wanting a combination of high-magnification binoculars and an advanced laser rangefinder

Key Features

• Elite Optical System – Delivers excellent dawn-to-dusk light transmission, advanced glare reduction, and outstanding resolution for bright, detailed images in demanding hunting conditions.
• 12x Magnification with 50mm Objective Lenses – Provides increased image detail for observing distant game, making this configuration particularly useful for open-country hunting and long-range glassing.
• High Definition Optical Performance – Delivers sharp resolution, natural color reproduction, and edge-to-edge clarity to help hunters identify and evaluate animals at extended distances.
• DNA Ranging Engine – Leupold's advanced ranging technology measures reflective targets out to 4,000 yards, trees to 2,200 yards, and deer-sized targets to 1,500 yards.
• True Ballistic Range/Wind (TBR/W) – Calculates ballistic shooting distances that account for steep shooting angles and rifle ballistics. It also provides a calculated hold point for a 10-mph crosswind at a 90-degree angle out to 800 yards.
• Archer's Advantage Technology – Uses arrow weight, arrow velocity, and peep height to provide customized angle-compensated ranges for bowhunters shooting across steep terrain or from elevated positions.
• Bow Mode – Provides angle-compensated ranging for archery applications, including tree-stand hunting and western spot-and-stalk situations.
• High-Contrast Red OLED Display – Presents clear ranging information with excellent contrast and visibility in varying light conditions.
• Last Target Mode – Prioritizes the most distant target detected along the laser's path, helping minimize interference from rain, snow, fog, or foreground objects.
• Line of Sight (LOS) Mode – Displays the direct straight-line distance to a target without applying angle compensation.
• Interchangeable Form-Fit Eyecups – Includes three eyecup configurations: winged eyecups for blocking stray light, medium eyecups for general viewing comfort, and low-profile eyecups designed for eyeglass wearers.
• Programmable Power Button – Allows users to interchange power and mode button functions for convenient right-handed or left-handed operation.
• Easy-Grip Button Standoffs – Raised controls make the ranging functions easier to locate and operate while wearing hunting gloves.
• Tripod Compatible – Built-in 1/4-20 rotatable tripod adapter port allows secure mounting for stable viewing during extended glassing sessions.
• Smooth Focusing System – Provides precise focus adjustments for sharp, detailed observation at varying distances.
• Waterproof and Fogproof Construction – Advanced internal sealing and gas-filled construction protect the optical system against moisture, temperature changes, and demanding weather conditions.

Why These Rangefinding Binoculars Stand Out

The Leupold BX-4 Range HD Gen 2 12x50 stands out for hunters who prioritize long-distance observation and accurate ranging without carrying separate binoculars and a handheld rangefinder. Its 12x magnification brings distant subjects closer, while the integrated laser rangefinder allows hunters to measure distances without switching optics or losing sight of their target.

Compared to the BX-4 Range HD Gen 2 10x42, the 12x50 configuration offers 20% more magnification and larger objective lenses, making it particularly attractive for glassing distant ridgelines, open basins, and expansive western landscapes. The tradeoff is a narrower field of view and shorter eye relief, so hunters who spend more time observing distant terrain may appreciate the 12x50, while those who prioritize a wider viewing area may prefer the 10x42.

Another important advantage is the combination of TBR/W and Archer's Advantage technology. Rifle hunters benefit from ballistic calculations that account for steep shooting angles and provide useful wind-hold information, while bowhunters can calculate angle-compensated distances based on their individual archery setup. This versatility makes the BX-4 Range HD Gen 2 a practical choice for hunters who pursue game with both rifles and bows.

For extended glassing sessions, the integrated tripod adapter port is especially useful at 12x magnification, where a stable viewing platform helps reduce image movement and eye fatigue. Combined with Leupold's Elite Optical System, customizable eyecups, and waterproof construction, these binoculars are designed for demanding hunters who spend considerable time searching distant terrain.

Specifications

• Manufacturer: Leupold
• Model: BX-4 Range HD Gen 2 TBR/W
• Product Number: 185700
• Magnification: 12x
• Objective Lens Diameter: 50mm
• Optical System: Elite Optical System
• Field of View @ 1,000 Yards: 279 ft
• Angular Field of View: 5.2 degrees
• Eye Relief: 14mm
• Exit Pupil: 4.2mm
• Close Focus Distance: 13 ft
• Interpupillary Distance: 60-77mm
• Diopter Adjustment Range: -3.5 to +3.5
• Maximum Range - Reflective Targets: 4,000 yds
• Maximum Range - Trees: 2,200 yds
• Maximum Range - Deer: 1,500 yds
• Minimum Ranging Distance: 12 yds
• Ranging Accuracy to 125 Yards: ±0.7 yd
• Ranging Accuracy to 1,000 Yards: ±1 yd
• Ranging Accuracy Beyond 1,000 Yards: ±0.2%
• Rifle Angle Compensation: TBR/W
• Archery Angle Compensation: Bow Mode with Archer's Advantage
• Display Type: OLED
• Display Color: Red
• Battery Type: CR2
• Battery Life: Up to 3,000 actuations
• Laser Classification: Class 1M
• Tripod Compatible: Yes, 1/4-20 threaded connection
• Length: 6.25 in
• Weight: 37 oz
• Construction: Waterproof and Fogproof

Complete your hunting setup by exploring our Leupold rifle scopes for dependable optical performance in the field. You can also compare additional ranging models in our Leupold rangefinders collection to find the right combination of magnification, ranging distance, and ballistic technology for your hunting needs.

Not sure whether 10x or 12x binoculars are right for your hunting style? Visit our optics buying guides and resources for helpful information about binocular magnification, objective lens size, field of view, and choosing optics for different hunting conditions.

Frequently Asked Questions

How far can the Leupold BX-4 Range HD Gen 2 12x50 range?
The BX-4 Range HD Gen 2 12x50 can measure reflective targets out to 4,000 yards, trees to 2,200 yards, and deer-sized targets to 1,500 yards. Actual ranging performance depends on target reflectivity, atmospheric conditions, and other environmental factors.

What is the advantage of TBR/W technology?
Leupold's True Ballistic Range/Wind technology calculates ballistic shooting distances that account for steep shooting angles and rifle ballistics. It also provides a calculated hold point for a 10-mph crosswind at a 90-degree angle out to 800 yards, helping hunters make more informed shooting adjustments.

Are the BX-4 Range HD Gen 2 12x50 binoculars good for long-range hunting?
Yes. The 12x magnification, 50mm objective lenses, Elite Optical System, and integrated long-range laser rangefinder make this configuration especially well suited for western big-game hunting, open-country observation, and long-distance glassing.

Can these rangefinding binoculars be used for bowhunting?
Yes. The BX-4 Range HD Gen 2 includes Bow Mode and Archer's Advantage technology. Archer's Advantage uses arrow weight, arrow velocity, and peep height to calculate customized angle-compensated ranging information for archery applications.

Are the Leupold BX-4 Range HD Gen 2 12x50 binoculars good in low light?
Yes. Leupold's Elite Optical System is designed to provide excellent light transmission, glare reduction, and HD image clarity. The 50mm objective lenses gather more total light than smaller objective lenses, while the 4.2mm exit pupil helps deliver a bright, detailed viewing experience in changing light conditions.

Can the BX-4 Range HD Gen 2 12x50 be mounted on a tripod?
Yes. These binoculars feature a built-in 1/4-20 rotatable tripod adapter port. Tripod mounting is especially beneficial at 12x magnification because it reduces image movement during extended observation.

Are these binoculars waterproof and fogproof?
Yes. Leupold designed the BX-4 Range HD Gen 2 with waterproof and fogproof construction to withstand moisture, temperature changes, and demanding outdoor hunting conditions.

What battery does the BX-4 Range HD Gen 2 12x50 use?
The integrated laser rangefinder operates on a CR2 battery and is rated for up to 3,000 ranging actuations under specified conditions.