← 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
Burris quotes 1,000 m, 1.4× our figure, because makers usually measure against a person’s full height rather than their width. Why the numbers differ
BurrisRiflescope · 640-class
Burris BTS35 v3 640
- Approx. price
- ~$4,200
- Sensor
- 640×480 · 12 µm
- Lens
- 35 mm · 2×
- Weight
- 27.2 oz
Buy from Burris
Price and availability on Burris’s site may differ.
Best for
A dedicated night rifle for hogs and coyotes inside about 150 yards
01Specifications
As published by Burris. Sources: burrisoptics.com page + BTS v3 manual (SKU 300605; base mag = manual 'Optical Zoom'; ballistics via BurrisConnect app profiles).
- Sensor
- 640×480
- Pixel pitch
- 12 µm
- NETD
- ≤30 mK
- Refresh rate
- 50 Hz
- Lens
- 35 mm
- Digital zoom
- up to 8×
- Field of view
- 12.5° horizontal
- Display
- 1024x768 OLED
- Claimed detection
- 1,000 m
- Claim basis
- deer
- Run time
- 6 h
- Battery type
- Internal + removable
- Weight
- 27.2 oz
- Length
- 11.7″
- Records video
- Yes
- Wi-Fi
- Yes
- IP rating
- IP67
- Warranty
- 3 years
- Approx. price
- ~$4,200
02Pros and cons
From the published specs, not owner reports.
For it
- 640×480 sensor, 2.8× the detail of an entry-level 384
- Ballistic calculator (you enter the range yourself)
- Swappable battery pack, so a spare doubles the run time
- Waterproof (IP67), 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
- No rangefinder, so you judge distance by eye
- ~$4,200, well above the ~$3,000 typical for riflescopes here
- Zoom past 2× is digital and gets blurry
03Compare the 640
04Related units
AGM Global VisionRiflescope
AGM Adder V2 LRF 35-640
Est. detection
729 m
Maker’s claim
1,800 m
- Sensor
- 640×512
- Pitch · Hz
- 12 µm · 50
- Lens
- 35 mm
LRF · 29.3 oz~$3,795
AGM Global VisionRiflescope
AGM Rattler V2 35-640
Est. detection
729 m
Maker’s claim
1,800 m
- Sensor
- 640×512
- Pitch · Hz
- 12 µm · 50
- Lens
- 35 mm
Swappable battery · 18 oz~$2,545
AGM Global VisionRiflescope
AGM Varmint V2 LRF 35-640
Est. detection
729 m
Maker’s claim
1,800 m
- Sensor
- 640×512
- Pitch · Hz
- 12 µm · 50
- Lens
- 35 mm
LRF · 18.3 oz~$2,995