← All units
Calculated from the sensor's pixel pitch and the lens focal length, for clear air. 
How far you can see a person
160 m make out detail260 m tell what it is1,042 m spot it┆ maker’s claim
501002005001k2k5k m
Guide quotes 2,600 m, 2.5× our figure, because makers usually measure against a person’s full height rather than their width. Why the numbers differ
GuideClip-on · 640-class · Laser rangefinder
Guide TB650 Pro LRF 2.0
- Approx. price
- ~$3,099
- Sensor
- 640×512 · 12 µm
- Lens
- 50 mm · 1×
- Weight
- 17.3 oz
Buy from Guide
Price and availability on Guide’s site may differ.
Best for
Keeping your day scope and its zero while adding thermal at night
01Specifications
As published by Guide. Sources: guideir-thermal.com, guideoutdoor.com.
- Sensor
- 640×512
- Pixel pitch
- 12 µm
- NETD
- 18 mK
- Refresh rate
- 50 Hz
- Lens
- 50 mm
- Digital zoom
- up to 1×
- Field of view
- 8.8° horizontal
- Display
- 1920x1080 AMOLED
- Claimed detection
- 2,600 m
- Claim basis
- unspecified
- Run time
- 5 h
- Battery type
- 18650
- Weight
- 17.3 oz
- Length
- 5.7″
- Records video
- Yes
- Wi-Fi
- Yes
- IP rating
- IP68
- Warranty
- 5 years (10 years on sensor)
- Approx. price
- ~$3,099
02Pros and cons
From the published specs, not owner reports.
For it
- 640×512 sensor, 3× the detail of an entry-level 384
- Sensitive sensor that picks out small heat differences on humid or rainy nights (56th-best of 285 that publish it)
- Built-in laser rangefinder
- Takes 18650 batteries you can swap in the field
- Waterproof (IP68), survives a dunking
- Records video and connects to a phone app
- Warranty: 5 years (10 years on sensor)
Against it
- 17.3 oz hanging off the front of your day scope
- Rangefinder but no ballistic calculator, so holdover is up to you
03Compare the 2.0
04Related units
GuideClip-on
Guide Orion O635CS
Est. detection
729 m
Maker’s claim
1,800 m
- Sensor
- 640×512
- Pitch · Hz
- 12 µm · 50
- Lens
- 35 mm
Swappable battery · 10.1 oz~$2,099
AGM Global VisionClip-on
AGM Rattler-C V2 50-640
Est. detection
1,042 m
Maker’s claim
2,600 m
- Sensor
- 640×512
- Pitch · Hz
- 12 µm · 50
- Lens
- 50 mm
Swappable battery · 19.4 oz~$3,795
ATNClip-on
ATN TICO 6 640x512
Est. detection
1,042 m
Maker’s claim
3,500 m
- Sensor
- 640×512
- Pitch · Hz
- 12 µm · 50
- Lens
- 50 mm
19.9 oz~$2,995