← 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
Guide quotes 1,300 m, 2.5× our figure, because makers usually measure against a person’s full height rather than their width. Why the numbers differ
GuideRiflescope · 400-class
Guide TU425 SE 3.0
- Approx. price
- ~$1,599
- Sensor
- 400×300 · 12 µm
- Lens
- 25 mm · 3.1×
- Weight
- 20.3 oz
Buy from Guide
Price and availability on Guide’s site may differ.
Best for
A dedicated night rifle for hogs and coyotes inside about 150 yards
01Specifications
As published by Guide. Sources: guideir-thermal.com, guideoutdoor.com.
- Sensor
- 400×300
- Pixel pitch
- 12 µm
- NETD
- 20 mK
- Refresh rate
- 50 Hz
- Lens
- 25 mm
- Digital zoom
- up to 12.4×
- Field of view
- 10.3° horizontal
- Display
- 1920x1080 AMOLED
- Claimed detection
- 1,300 m
- Claim basis
- unspecified
- Run time
- 12 h
- Battery type
- Internal + removable
- Weight
- 20.3 oz
- Length
- 12.2″
- Records video
- Yes
- Wi-Fi
- Yes
- IP rating
- IP68
- Warranty
- 5 years (10 years on sensor)
- Approx. price
- ~$1,599
02Pros and cons
From the published specs, not owner reports.
For it
- Sensitive sensor that picks out small heat differences on humid or rainy nights (104th-best of 285 that publish it)
- 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
- Warranty: 5 years (10 years on sensor)
- ~$1,599, well under the ~$3,000 typical for riflescopes here
Against it
- Short 25 mm lens: a wide view, but less reach than a 50 mm scope
- No rangefinder, so you judge distance by eye
- Zoom past 3.1× is digital and gets blurry
03Compare the 3.0
04Related units
GuideRiflescope
Guide TU435 LRF 3.0
Est. detection
729 m
Maker’s claim
1,800 m
- Sensor
- 400×300
- Pitch · Hz
- 12 µm · 50
- Lens
- 35 mm
LRF · 27.5 oz~$1,899
BurrisRiflescope
Burris BTS35 v3
Est. detection
729 m
Maker’s claim
1,000 m
- Sensor
- 400×300
- Pitch · Hz
- 12 µm · 50
- Lens
- 35 mm
27.2 oz~$3,000
AthlonRiflescope
Athlon Cronus ATS 35-400
Est. detection
729 m
Maker’s claim
not published
- Sensor
- 400×300
- Pitch · Hz
- 12 µm · —
- Lens
- 35 mm
35.3 oz~$3,250