ATN BlazeHunter 635 — 640×512 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.

ATN quotes 1,830 m, 2.5× our figure, because makers usually measure against a person’s full height rather than their width. Why the numbers differ

ATNHandheld monocular · 640-class

ATN BlazeHunter 635

Approx. price: ~$1,695
Sensor: 640×512 · 12 µm
Lens: 35 mm · 2.5×
Weight: 11.3 oz

Price and availability on ATN’s site may differ.

Best for

Walk-and-scan glassing from a jacket pocket

01Specifications

As published by ATN. Sources: atncorp.com (product page + compare API; ATN list $2,415).

Sensor: 640×512
Pixel pitch: 12 µm
NETD: <18 mK
Refresh rate: 50 Hz
Lens: 35 mm
Base magnification: 2.5×
Digital zoom: up to 20×
Field of view: 12.4° horizontal
Display: 1440x1080 OLED
Claimed detection: 1,830 m
Claim basis: unspecified (ATN product page 2000 yd)
Run time: 14 h
Battery type: 18650
Weight: 11.3 oz
Length: 6″
Laser rangefinder: No
Ballistic calculator: No
Records video: Yes
Wi-Fi: Yes
IP rating: IP67
Warranty: 3 years
Approx. price: ~$1,695

02Pros and cons

From the published specs, not owner reports.

For it

640×512 sensor, 3× the detail of an entry-level 384
Sensitive sensor that picks out small heat differences on humid or rainy nights (56th-best of 285 that publish it)
Takes 18650 batteries you can swap in the field
14 h of battery, the longest of 344 here
Waterproof (IP67), survives a dunking
Records video and connects to a phone app

Against it

No rangefinder, so you judge distance by eye
Zoom past 2.5× is digital and gets blurry

03Compare the 635

04Related units

More from ATN →All 640-class →All 35 mm →

ATN BlazeHunter 635 LRF — 640×512 thermal handheld monocular

ATNHandheld monocular

ATN BlazeHunter 635 LRF

Est. detection

729 m

Maker’s claim

1,830 m

Sensor: 640×512
Pitch · Hz: 12 µm · 50
Lens: 35 mm

LRF · 12.7 oz~$1,895

ATN ODIN LT 640 3-12x — 640×480 thermal handheld monocular

ATNHandheld monocular

ATN ODIN LT 640 3-12x

Est. detection

729 m

Maker’s claim

1,440 m

Sensor: 640×480
Pitch · Hz: 12 µm · 60
Lens: 35 mm

60 Hz · 12.1 oz~$2,895

ATN BlazeTrek 6 625 — 640×512 thermal handheld monocular

ATNHandheld monocular

ATN BlazeTrek 6 625

Est. detection

521 m

Maker’s claim

1,300 m

Sensor: 640×512
Pitch · Hz: 12 µm · 50
Lens: 25 mm

11.3 oz~$1,499