← All units
Calculated from the sensor's pixel pitch and the lens focal length, for clear air. 
How far you can see a person
112 m make out detail182 m tell what it is729 m spot it
501002005001k2k5k m
AthlonClip-on · 640-class · Laser rangefinder
Athlon Cronus ATS Pro 35CL-640
- Approx. price
- ~$4,000
- Sensor
- 640×512 · 12 µm
- Lens
- 35 mm
- Weight
- 17 oz
Buy from Athlon
Price and availability on Athlon’s site may differ.
Best for
Keeping your day scope and its zero while adding thermal at night
01Specifications
As published by Athlon. Sources: athlonoptics.com.
- Sensor
- 640×512
- Pixel pitch
- 12 µm
- NETD
- ≤25 mK
- Lens
- 35 mm
- Field of view
- 12.5° horizontal
- Display
- 1280x960 OLED
- Run time
- 5 h
- Weight
- 17 oz
- Length
- 5.2″
- Records video
- Yes
- Wi-Fi
- Yes
- Approx. price
- ~$4,000
02Pros and cons
From the published specs, not owner reports.
For it
- 640×512 sensor, 3× the detail of an entry-level 384
- Built-in laser rangefinder that feeds the ballistic calculator
- Records video and connects to a phone app
Against it
- 17 oz hanging off the front of your day scope
- No waterproof rating published
- Warranty terms not published
03Compare the 35CL-640
04Related units
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
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
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