Burris BTH35 V3

• 35 mm F1.0 objective: The larger front lens gathers more thermal energy than shorter-lens handhelds, helping the monocular hold detail at distance and making target identification easier in open ground.
• 400x300 VOx sensor with 12 μm pixels: This sensor format balances image detail with a compact housing, giving a clear thermal view for scanning, spotting heat signatures and following movement after dark.
• 50 Hz refresh rate: Fast image updates keep moving animals and vehicles looking natural in the display, which matters when panning quickly or tracking across uneven terrain.
• Wi-Fi, video and image recording: Built-in connectivity and recording let the BTH35 V3 document observations, share the live view and support remote control through a mobile device in the field.
• 18650 power with 5-hour runtime: A common battery format and practical runtime make the unit easier to keep running on longer outings, while the handheld form stays portable at 630 g.

About the Burris H Series Series

The Burris H Series is Burris’ family of thermal handhelds built for target identification and tracking, with a strong emphasis on night hunting and general observation after dark. Within Burris’ thermal lineup, these models fill the role of compact scanning devices that let the user search wide areas before moving to a weapon-mounted optic or closing distance for a better look. The series has been offered with 19 mm, 25 mm, 35 mm and 50 mm lenses, giving users a choice between wider coverage and stronger reach depending on terrain and expected engagement distances.

BTH handhelds are defined by practical field features rather than a stripped-down viewing experience. Burris equips the series with selectable color palettes to adapt the image to background conditions and user preference, while hot-track functionality helps keep attention on the warmest target in the scene. The series also supports Wi-Fi connectivity for mobile-device control and recording, which adds flexibility for observation, documentation and shared viewing. In short, the H Series is aimed at hunters and outdoor users who need a dedicated thermal monocular that is easy to carry, quick to deploy and focused on detection and tracking rather than daytime optical magnification.

About the Burris BTH35 V3

The Burris BTH35 V3 is a thermal monocular configured for users who need more reach than a compact entry-level handheld, but still want a unit that remains practical to carry for long periods. Its 35.00 mm objective and 1000.00 m detection range make it well suited to scanning fields, edges of woodland, tracks and open ground where heat signatures may appear at varying distances. Because this is a handheld thermal, the emphasis is on fast detection and observation rather than optical zoom, which helps preserve a natural scanning rhythm and a stable image while moving.

At the core of the unit is a 400x300 VOx uncooled sensor with 12.00 μm pixel pitch, 50.00 mK NETD and a 50.00 Hz refresh rate. In practical use, that combination supports smooth target tracking and enough thermal detail to separate animals, people and background clutter with confidence. The LCOS display with 1280x960 resolution presents the image with enough apparent detail for extended observation, while the -4/+4 dpt diopter adjustment helps tailor the view to the user’s eyesight. A 7.80 ° field of view gives a useful balance between area coverage and target scale, making the BTH35 V3 a sensible middle-ground option in the series.

The housing is built for field use, with waterproof and fogproof construction, a working temperature range of -10°C to +50°C and a manageable weight of 630.00 g. Recording functions for still images and video, plus Wi-Fi connectivity and video output, add practical value for documenting sightings, reviewing movement and sharing the live view. Power comes from an 18650 battery, giving a stated 5.00 h battery life in a format that is easy to replace in the field.

About Burris

Burris was founded in 1971 and takes its name from founder Don Burris. The company is headquartered in Greeley, Colorado, United States and focuses on sporting optics and shooting accessories, including hunting and tactical riflescopes, red-dot and reflex sights, binoculars, spotting scopes, rangefinders, thermal optics, rings and mounts. That broad product range helps explain Burris’ reputation for building optics around practical field use rather than narrow specialization.

Several milestones are especially relevant to this category. Burris began marketing the Fullfield riflescope series in 1975, introduced the Ballistic Plex trajectory-compensating reticle in 2000 and became part of Beretta Holdings in 2002. Later launches such as the FastFire mini red-dot reflex sight in 2007 and the Eliminator riflescope with integrated laser rangefinding and automatic bullet-drop compensation in 2010 show Burris’ long-standing interest in practical aiming and ranging technology. That same approach carries into its thermal optics, where usability and field-ready features matter as much as raw specifications.

Main Features

• Product type: Thermal monocular
• Series: Burris H Series
• Made in: USA
• Sensor type: VOx Uncooled
• Sensor resolution: 400x300
• Pixel pitch: 12.00 μm
• NETD: 50.00 mK
• Refresh rate: 50.00 Hz
• Calibration mode: Automatic, Manual
• Objective lens diameter: 35.00 mm
• Lens aperture: F 1.0
• Detection range: 1000.00 m
• Field of view: 136.00 m/1000m
• Field of view (angular): 7.80 °
• Eye relief: 17.00 mm
• Diopter range: -4/+4 dpt
• Display type: LCOS
• Display resolution: 1280x960
• Image capture: Yes
• Video recording: Yes
• Video output: Yes
• Connectivity: Wifi
• Built-in rangefinder: No
• Power supply: 18650
• Battery life: 5.00 h
• Waterproof: Yes
• Fogproof: Yes
• Operating temperature: -10°C to +50°C
• Dimensions: 249.00 mm x 61.00 mm x 70.00 mm
• Weight: 630.00 g
• Color: Black

Warranty

Burris covers the BTH35 V3 for 3 years. For Burris thermal optics, this warranty period applies to defects in materials and workmanship for the optic itself.

In the Box

• Neck strap
• Carrying case
• Wrist strap
• M1913 accessory rails
• USB-C to USB-A cable
• USB-C to RCA cable