Armasight · Contractor 640 3-12x50

Estimated range, standing human, clear air

IdentifyRecognizeDetectBox claim

Armasight Contractor 640 3-12x50640×480 · 12 µm · 50 mm

160 m identify260 m recognize1,042 m detectbox says 1,865 m (human-sized target)

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Estimated from pixel pitch and lens focal length using the Johnson criteria (2, 8 and 13 pixels across a 0.5 m human critical dimension), clear air, 50 % probability. A model of the optics, not a measurement — real range depends on temperature contrast, humidity and the animal.

Armasight

Armasight Contractor 640 3-12x50

Riflescope640-class

The Armasight Contractor 640 3-12x50 is a 640×480, 12 µm thermal riflescope behind a 50 mm lens. On the Johnson yardstick that is an estimated 1,042 m detection and 260 m recognition range for a standing person; Armasight quotes 1,865 m detection (human-sized target). Its published <40 mK NETD ranks 36th of the 51 units here that publish one.

Approx. price: ~$2,999
Sensor: 640×480 · 12 µm
Lens: 50 mm · 3.2×
Est. detection: 1,042 m · 1,140 yd

Best for

A dedicated night rifle for hogs and coyotes on open ground

We may earn a commission. Price and availability on Armasight’s site may differ.

Box claim vs. what the optics support

Manufacturer says

1,865 m

detection, human-sized target

Johnson estimate

1,042 m

detect · 260 m recognize · 160 m identify

Claim ÷ estimate

1.8×

how much further the box reaches than a 2-pixel, 0.5 m criterion

One pixel of this unit sees 0.240 mrad (12 µm ÷ 50 mm). Two pixels across a 0.5 m human is 0.5 ÷ (2 × 0.240) × 1000 = 1,042 m. The box figure is usually computed against a person’s 1.8 m height instead, which is why it comes out higher. Full explanation.

Specifications

Manufacturer-published figures, cross-checked against armasight.com (sale $2,999-3,199; MSRP $5,299).

Sensor: 640×480
Pixel pitch: 12 µm
NETD: <40 mK
Refresh rate: 60 Hz
Lens: 50 mm
Base magnification: 3.2×
Digital zoom: up to 4×
Field of view: 8.8° horizontal
Display: 1024x768 AMOLED
Claimed detection: 1,865 m
Claim basis: human-sized target
Run time: 4 h
Battery type: CR123
Weight: 32 oz
Length: 9.4″
Laser rangefinder: No
Ballistic calculator: No
Records video: Yes
Wi-Fi: Yes
IP rating: IP67
Warranty: 3 years
Approx. price: ~$2,999

Derived here

IFOV: 0.240 mrad
Est. detection: 1,042 m
Est. recognition: 260 m
Est. identification: 160 m
Claim ÷ estimate: 1.8×
Derived field of view: 8.8°
Pixels per degree: 72.9

Features

640 sensor
12 µm
50 mm lens
60 Hz
Removable battery
Records video
Wi-Fi
IP67
AMOLED display

What the spec sheet says

Read from the published specifications and this catalog’s own numbers — not from owner reports, which we have not collected for this unit.

For it

640×480 core — 2.8× the pixels of a 384-class unit
12 µm pitch — the 50 mm lens sees what a 17 µm core would need 71 mm to match
60 Hz core — 20 % more frames than the 50 Hz norm when an animal runs
Runs on CR123 cells you can swap in the field
IP67 sealed — survives immersion, not just rain
Records video and streams to a phone over Wi-Fi
Detection claim is only 1.8× our estimate — one of the more conservative box figures here

Against it