Armasight Operator 640 1-4x35 — 640×480 thermal clip-on

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.

Armasight quotes 1,305 m, 1.8× our figure, because makers usually measure against a person’s full height rather than their width. Why the numbers differ

ArmasightClip-on · 640-class

Armasight Operator 640 1-4x35

Approx. price: ~$3,439
Sensor: 640×480 · 12 µm
Lens: 35 mm · 1×
Weight: 16.7 oz

Buy from Armasight

Price and availability on Armasight’s site may differ.

Best for

Keeping your day scope and its zero while adding thermal at night

01Specifications

As published by Armasight. Sources: armasight.com (SKU TAVT66CN3OPER102; sale price $3,439.20, MSRP $4,299; Thermal Sensitivity field blank; 473 g; 154 mm; unity 1x for 1-6x day optics; 'Wireless: None').

Sensor: 640×480
Pixel pitch: 12 µm
Refresh rate: 60 Hz
Lens: 35 mm
Base magnification: 1×
Digital zoom: up to 4×
Field of view: 12.6° horizontal
Display: 1024x768 OLED
Claimed detection: 1,305 m
Claim basis: human-sized target
Run time: 4 h
Battery type: CR123
Weight: 16.7 oz
Length: 6.1″
Laser rangefinder: No
Ballistic calculator: No
Records video: Yes
Wi-Fi: No
IP rating: IP67
Warranty: 3 years (with registration)
Approx. price: ~$3,439

02Pros and cons

From the published specs, not owner reports.

For it

640×480 sensor, 2.8× the detail of an entry-level 384
Smooth 60 Hz picture on a running animal
Takes CR123 batteries you can swap in the field
Waterproof (IP67), survives a dunking

Against it

Sensitivity (NETD) not published
Only 4 h of battery
16.7 oz hanging off the front of your day scope
No rangefinder, so you judge distance by eye
Zoom past 1× is digital and gets blurry

03Compare the 1-4x35

04Related units

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

Armasight Jockey 640 — 640×480 thermal clip-on

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Armasight Jockey 640

Est. detection

521 m

Maker’s claim

932 m

Sensor: 640×480
Pitch · Hz: 12 µm · 60
Lens: 25 mm

60 Hz · 14 oz~$3,799

Steiner Nighthunter C35 Gen II — 640×512 thermal clip-on

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Steiner Nighthunter C35 Gen II

Est. detection

729 m

Maker’s claim

not published

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

16.2 oz~$3,450

Athlon Cronus ATS Pro 35C-640 — 640×512 thermal clip-on

AthlonClip-on

Athlon Cronus ATS Pro 35C-640

Est. detection

729 m

Maker’s claim

not published

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

17.2 oz~$3,500