← All units
Calculated from the sensor's pixel pitch and the lens focal length, for clear air. 
How far you can see a person
128 m make out detail208 m tell what it is833 m spot it
501002005001k2k5k m
Sig SauerRiflescope · 320-class
Sig Sauer ECHO3 2-12x40
- Approx. price
- ~$3,000
- Sensor
- 320×240 · 12 µm
- Lens
- 40 mm · 2×
- Weight
- 16.6 oz
Buy from Sig Sauer
Price and availability on Sig Sauer’s site may differ.
Best for
A dedicated night rifle for hogs and coyotes on open ground
01Specifications
As published by Sig Sauer. Sources: sigsauer.com ECHO3 owner's manual PDF (spec table: 320x240 12 um 30 Hz, FOV 5.8 deg, >6 h on 2x CR123, 16.6 oz, 471 g, 4.7 in, 120 mm, IPX-4; 40 mm objective passes the FOV check), sportsmans.com SKU SOEC32001 (regular $2,999.99, on sale $2,399.77, out of stock on the day read; sigsauer.com product pages 403 to fetchers).
- Sensor
- 320×240
- Pixel pitch
- 12 µm
- Refresh rate
- 30 Hz
- Lens
- 40 mm
- Digital zoom
- up to 12×
- Field of view
- 5.8° horizontal
- Display
- 454x454 AMOLED
- Run time
- 6 h
- Battery type
- CR123
- Weight
- 16.6 oz
- Length
- 4.7″
- Records video
- Yes
- Wi-Fi
- Yes
- IP rating
- IPX4
- Warranty
- Infinite Guarantee (electronics 5 years)
- Country of origin
- USA
- Approx. price
- ~$3,000
02Pros and cons
From the published specs, not owner reports.
For it
- Ballistic calculator (you enter the range yourself)
- Takes CR123 batteries you can swap in the field
- Light at 16.6 oz, 15th-lightest of the 194 riflescopes here
- Records video and connects to a phone app
- Warranty: Infinite Guarantee (electronics 5 years)
Against it
- Sensitivity (NETD) not published
- Choppy 30 Hz picture on a running animal
- No rangefinder, so you judge distance by eye
- Entry-level 320×240 sensor, with less detail than a 640
- Narrow 5.5° view, so a moving animal is hard to find
- Zoom past 2× is digital and gets blurry
03Compare the 2-12x40
04Related units
Sig SauerRiflescope
Sig Sauer ECHO3 1-6x23
Est. detection
479 m
Maker’s claim
not published
- Sensor
- 320×240
- Pitch · Hz
- 12 µm · 30
- Lens
- 23 mm
14.5 oz~$2,500
ATNRiflescope
ATN ThOR 5 320 5-20x
Est. detection
729 m
Maker’s claim
2,560 m
- Sensor
- 320×240
- Pitch · Hz
- 12 µm · 60
- Lens
- 35 mm
60 Hz · 30.7 oz~$2,095
ATNRiflescope
ATN ThOR 5 LRF 320 5-20x
Est. detection
729 m
Maker’s claim
2,560 m
- Sensor
- 320×240
- Pitch · Hz
- 12 µm · 60
- Lens
- 35 mm
LRF · 60 Hz · 34.6 oz~$2,295