← 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┆ 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
GuideHandheld monocular · 640-class · Laser rangefinder
Guide Kodiak TK635 LRF 3.0
- Approx. price
- ~$2,499
- Sensor
- 640×512 · 12 µm
- Lens
- 35 mm · 2.8×
- Weight
- 18.5 oz
Buy from Guide
Price and availability on Guide’s site may differ.
Best for
Scanning from a stand, a truck or a field edge
01Specifications
As published by Guide. Sources: guideir-thermal.com, guideoutdoor.com.
- Sensor
- 640×512
- Pixel pitch
- 12 µm
- NETD
- 15 mK
- Refresh rate
- 50 Hz
- Lens
- 35 mm
- Digital zoom
- up to 22.4×
- Field of view
- 12.5° horizontal
- Display
- 2560x2560 AMOLED
- Claimed detection
- 1,800 m
- Claim basis
- unspecified
- Run time
- 5.5 h
- Battery type
- Removable pack
- Weight
- 18.5 oz
- Length
- 7.2″
- Records video
- Yes
- Wi-Fi
- Yes
- IP rating
- IP67
- Warranty
- 5 years (10 years on sensor)
- Approx. price
- ~$2,499
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 (the best of 285 that publish it)
- Built-in laser rangefinder
- Swappable battery pack, so a spare doubles the run time
- Waterproof (IP67), survives a dunking
- Records video and connects to a phone app
- Warranty: 5 years (10 years on sensor)
Against it
- Rangefinder but no ballistic calculator, so holdover is up to you
- Zoom past 2.8× is digital and gets blurry
03Compare the 3.0
04Related units
GuideHandheld monocular
Guide TD633 LRF
Est. detection
729 m
Maker’s claim
1,800 m
- Sensor
- 640×512
- Pitch · Hz
- 12 µm · 50
- Lens
- 35 mm
LRF · 13.3 oz~$1,799
GuideHandheld monocular
Guide Kodiak TK650 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 · Swappable battery · 20.9 oz~$2,899
GuideHandheld monocular
Guide TD653 LRF
Est. detection
1,042 m
Maker’s claim
2,600 m
- Sensor
- 640×512
- Pitch · Hz
- 12 µm · 50
- Lens
- 50 mm
LRF · 16.6 oz~$1,899