Burris BTH35 v2 — 400×300 thermal handheld monocular

How far you can see a person

112 m make out detail182 m tell what it is729 m spot it┆ maker’s claim

501002005001k2k5k m

Calculated from the sensor's pixel pitch and the lens focal length, for clear air.

Burris quotes 1,000 m, 1.4× our figure, because makers usually measure against a person’s full height rather than their width. Why the numbers differ

BurrisHandheld monocular · 400-class

Burris BTH35 v2

Approx. price: ~$2,799
Sensor: 400×300 · 12 µm
Lens: 35 mm · 3.3×
Weight: 22 oz

Buy from Burris

Price and availability on Burris’s site may differ.

Best for

Scanning from a stand, a truck or a field edge

01Specifications

As published by Burris. Sources: burrisoptics.com page (item 300632, MSRP $2,799; listed in the maker's current lineup, not marked discontinued; 22 oz; 249 mm) + BTH v2 user manual (NETD ≤50 mK; 1,000 m deer detection; 3.3x optical with 1-4x digital so 13.2x total; 2x internal 18650, ≥5 h; built-in 16 GB photo, video recording; Wi-Fi) + burrisoptics.com US thermal warranty page, eurooptic.com ($1,049.99 street, limited stock), midwayusa.com (in stock).

Sensor: 400×300
Pixel pitch: 12 µm
NETD: ≤50 mK
Refresh rate: 50 Hz
Lens: 35 mm
Base magnification: 3.3×
Digital zoom: up to 13.2×
Field of view: 7.8° horizontal
Display: 1280x960 LCOS
Claimed detection: 1,000 m
Claim basis: deer
Run time: 5 h
Battery type: Internal Li-ion
Weight: 22 oz
Length: 9.8″
Laser rangefinder: No
Ballistic calculator: No
Records video: Yes
Wi-Fi: Yes
Warranty: 3 years
Approx. price: ~$2,799

02Pros and cons

From the published specs, not owner reports.

For it

Records video and connects to a phone app

Against it

Built-in battery, so no swapping in the field, and only 5 h of it
Heavy at 22 oz, 17th-heaviest of the 112 handhelds here
No rangefinder, so you judge distance by eye
Narrow 7.8° view, so a moving animal is hard to find
No waterproof rating published
~$2,799, well above the ~$1,995 typical for handhelds here

03Compare the v2

04Related units

More from Burris →All 400-class →All 35 mm →

Burris BTH35 v3 — 400×300 thermal handheld monocular

BurrisHandheld monocular

Burris BTH35 v3

Est. detection

729 m

Maker’s claim

1,000 m

Sensor: 400×300
Pitch · Hz: 12 µm · 50
Lens: 35 mm

22 oz~$2,160

Athlon Cronus ATS 35M-400 — 400×300 thermal handheld monocular

AthlonHandheld monocular

Athlon Cronus ATS 35M-400

Est. detection

729 m

Maker’s claim

not published

Sensor: 400×300
Pitch · Hz: 12 µm · —
Lens: 35 mm

12.3 oz~$1,875

Athlon Cronus ATS 35ML-400 — 400×300 thermal handheld monocular

AthlonHandheld monocular

Athlon Cronus ATS 35ML-400

Est. detection

729 m

Maker’s claim

not published

Sensor: 400×300
Pitch · Hz: 12 µm · —
Lens: 35 mm

LRF · 14.8 oz~$2,375