← All unitsCalculated from the sensor's pixel pitch and the lens focal length, for clear air. 
Guide · TU635 LRF 3.0
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
Guide quotes 1,800 m, 2.5× our figure, because makers usually measure against a person’s full height rather than their width. Why the numbers differ
GuideRiflescope · 640-class · Laser rangefinder
Guide TU635 LRF 3.0
- Approx. price
- ~$2,699
- Sensor
- 640×512 · 12 µm
- Lens
- 35 mm · 3×
- Weight
- 28.8 oz
Buy from Guide
Price and availability on Guide’s site may differ.
Best for
Night shooting where ranging matters — hogs and coyotes past 150 yards
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
- 35 mm
- Digital zoom
- up to 24×
- Field of view
- 11.8° horizontal
- Display
- 1920x1080 AMOLED
- Claimed detection
- 1,800 m
- Claim basis
- unspecified
- Run time
- 12 h
- Battery type
- Internal + removable
- Weight
- 28.8 oz
- Length
- 14.7″
- Records video
- Yes
- Wi-Fi
- Yes
- IP rating
- IP68
- Warranty
- 5 years (10 years on sensor)
- Approx. price
- ~$2,699
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
- Swappable battery pack, so a spare doubles the run time
- 12 h of battery, 8th-longest of 344 here
- Waterproof (IP68), survives a dunking
- Records video and connects to a phone app
Against it
- Short 35 mm lens: a wide view, but less reach than a 50 mm scope
- Rangefinder but no ballistic calculator, so holdover is up to you
- Zoom past 3× is digital and gets blurry
03Compare the 3.0
04Related units
GuideRiflescope
Guide TU650 LRF 3.0
Est. detection
1,042 m
Maker’s claim
2,600 m
- Sensor
- 640×512
- Pitch · Hz
- 12 µm · 50
- Lens
- 50 mm
LRF · 28.8 oz~$2,999
GuideRiflescope
Guide TU650 LRF Pro 3.0
Est. detection
1,042 m
Maker’s claim
2,600 m
- Sensor
- 640×512
- Pitch · Hz
- 12 µm · 50
- Lens
- 50 mm
LRF · 32.6 oz~$3,499
GuideRiflescope
Guide TU650 M 3.0
Est. detection
1,042 m
Maker’s claim
2,600 m
- Sensor
- 640×512
- Pitch · Hz
- 12 µm · 50
- Lens
- 50 mm
LRF · 35.7 oz~$3,799