How far you can see a person

61 m make out detail99 m tell what it is396 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 490 m, 1.2× our figure, because makers usually measure against a person’s full height rather than their width. Why the numbers differ

ATNHandheld monocular · 320-class

ATN ODIN LT 320 2-4x

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Best for

Walk-and-scan glassing from a jacket pocket

01Specifications

As published by ATN. Sources: atncorp.com (product page + compare API, ODIN LT manual; ATN list $1,599).

Sensor: 320×240
Pixel pitch: 12 µm
NETD: ≤15 mK
Refresh rate: 60 Hz
Lens: 19 mm
Base magnification: 2×
Digital zoom: up to 4×
Field of view: 11.6° horizontal
Display: 1280x960
Claimed detection: 490 m
Claim basis: human-sized target (ATN product page 535 yd; ATN manual labels it 'Human Detection Range')
Run time: 2.5 h
Battery type: CR123
Weight: 10.1 oz
Length: 5.2″
Laser rangefinder: No
Ballistic calculator: No
Records video: No
Wi-Fi: No
Warranty: 5 years
Country of origin: USA
Approx. price: ~$1,299

From the published specs, not owner reports.

For it

Sensitive sensor that picks out small heat differences on humid or rainy nights (the best of 285 that publish it)
Smooth 60 Hz picture on a running animal
Takes CR123 batteries you can swap in the field
Light at 10.1 oz, 22nd-lightest of the 112 handhelds here
Warranty: 5 years
~$1,299, well under the ~$1,995 typical for handhelds here

Against it