← All units
Calculated from the sensor's pixel pitch and the lens focal length, for clear air. 
How far you can see a person
80 m make out detail130 m tell what it is521 m spot it┆ maker’s claim
501002005001k2k5k m
Armasight quotes 932 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 Jockey 640
- Approx. price
- ~$3,799
- Sensor
- 640×480 · 12 µm
- Lens
- 25 mm · 1×
- Weight
- 14 oz
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Best for
Keeping your day scope and its zero while adding thermal at night
01Specifications
As published by Armasight. Sources: armasight.com.
- Sensor
- 640×480
- Pixel pitch
- 12 µm
- NETD
- <40 mK
- Refresh rate
- 60 Hz
- Lens
- 25 mm
- Digital zoom
- up to 4×
- Field of view
- 17.6° horizontal
- Display
- 1024x768 OLED
- Claimed detection
- 932 m
- Claim basis
- human-sized target
- Run time
- 4 h
- Battery type
- CR123
- Weight
- 14 oz
- Length
- 5.8″
- Records video
- Yes
- Wi-Fi
- No
- IP rating
- IP67
- Warranty
- 3 years
- Country of origin
- USA (assembled from U.S. and global components)
- Approx. price
- ~$3,799
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
- Light at 14 oz, 4th-lightest of the 29 clip-ons here
- Waterproof (IP67), survives a dunking
Against it
- Only 4 h of battery
- No rangefinder, so you judge distance by eye
- Zoom past 1× is digital and gets blurry
03Compare the 640
04Related units
ArmasightClip-on
Armasight Operator 640 1-4x35
Est. detection
729 m
Maker’s claim
1,305 m
- Sensor
- 640×480
- Pitch · Hz
- 12 µm · 60
- Lens
- 35 mm
60 Hz · 16.7 oz~$3,439
Sig SauerClip-on
Sig Sauer ECHO CV25
Est. detection
521 m
Maker’s claim
not published
- Sensor
- 640×512
- Pitch · Hz
- 12 µm · 50
- Lens
- 25 mm
18.8 oz~$4,000
SteinerClip-on
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