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Calculated from the sensor's pixel pitch and the lens focal length, for clear air. 
How far you can see a person
74 m make out detail120 m tell what it is479 m spot it
501002005001k2k5k m
Sig SauerRiflescope · 320-class
Sig Sauer ECHO3 1-6x23
- Approx. price
- ~$2,500
- Sensor
- 320×240 · 12 µm
- Lens
- 23 mm · 1×
- Weight
- 14.5 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 inside about 150 yards
01Specifications
As published by Sig Sauer. Sources: sigsauer.com ECHO3 owner's manual PDF (spec table: 320x240 12 um 30 Hz, FOV 10 deg, >6 h on 2x CR123, 14.5 oz, 411 g, 4.4 in, 112 mm, IPX-4, 'designed and assembled in the USA'; Sig publishes only the 23 mm objective, which passes the FOV check), sportsmans.com SKU SOEC31001 (regular $2,499.99, on sale $1,999.77, out of stock on the day read; sigsauer.com product pages 403 to fetchers, 2020 launch MSRP was $3,899.99; ballisticCalc = BDX holdover reticles from a paired KILO rangefinder).
- Sensor
- 320×240
- Pixel pitch
- 12 µm
- Refresh rate
- 30 Hz
- Lens
- 23 mm
- Digital zoom
- up to 6×
- Field of view
- 10° horizontal
- Display
- 454x454 AMOLED
- Run time
- 6 h
- Battery type
- CR123
- Weight
- 14.5 oz
- Length
- 4.4″
- Records video
- Yes
- Wi-Fi
- Yes
- IP rating
- IPX4
- Warranty
- Infinite Guarantee (electronics 5 years)
- Country of origin
- USA
- Approx. price
- ~$2,500
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 14.5 oz, 8th-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
- Short 23 mm lens: a wide view, but less reach than a 50 mm scope
- No rangefinder, so you judge distance by eye
- Entry-level 320×240 sensor, with less detail than a 640
- Zoom past 1× is digital and gets blurry
03Compare the 1-6x23
04Related units
Sig SauerRiflescope
Sig Sauer ECHO3 2-12x40
Est. detection
833 m
Maker’s claim
not published
- Sensor
- 320×240
- Pitch · Hz
- 12 µm · 30
- Lens
- 40 mm
16.6 oz~$3,000
ArmasightRiflescope
Armasight Contractor 320 3-12x25
Est. detection
521 m
Maker’s claim
932 m
- Sensor
- 320×240
- Pitch · Hz
- 12 µm · 60
- Lens
- 25 mm
60 Hz · 26.5 oz~$1,649
AGM Global VisionRiflescope
AGM Rattler V2 25-320
Est. detection
521 m
Maker’s claim
1,200 m
- Sensor
- 320×256
- Pitch · Hz
- 12 µm · 50
- Lens
- 25 mm
Swappable battery · 17.3 oz~$1,095