Sig Sauer ECHO SV50-LRF — 640×512 thermal riflescope

How far you can see a person

160 m make out detail260 m tell what it is1,042 m spot it

501002005001k2k5k m

Calculated from the sensor's pixel pitch and the lens focal length, for clear air.

Sig SauerRiflescope · 640-class · Laser rangefinder

Sig Sauer ECHO SV50-LRF

Approx. price: ~$4,500
Sensor: 640×512 · 12 µm
Lens: 50 mm · 2×
Weight: 31.3 oz

Price and availability on Sig Sauer’s site may differ.

Best for

Night shooting where ranging matters — hogs and coyotes past 150 yards

01Specifications

As published by Sig Sauer. Sources: sigsauer.com ECHO SV LRF operator's manual PDF (spec table: 2-16x, FOV 8.8 deg, 640x512 12 um 50 Hz, OLED 1024x768, 11+ h on 2x 18650, IP67, 10.7 in, 273 mm, 31.3 oz, 888 g without battery; 1000 yd LRF + Applied Ballistics Ultralight), sportsmans.com SKU SOEC12310 ($4,499.99, unavailable online on the day read; <=20 mK; sigsauer.com product page 403 to fetchers).

Sensor: 640×512
Pixel pitch: 12 µm
NETD: ≤20 mK
Refresh rate: 50 Hz
Lens: 50 mm
Base magnification: 2×
Digital zoom: up to 16×
Field of view: 8.8° horizontal
Display: 1024x768 OLED
Run time: 11 h
Battery type: 18650
Weight: 31.3 oz
Length: 10.7″
Laser rangefinder: Yes
Ballistic calculator: Yes
Records video: Yes
Wi-Fi: Yes
IP rating: IP67
Warranty: Infinite Guarantee
Approx. price: ~$4,500

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 (104th-best of 285 that publish it)
Built-in laser rangefinder that feeds the ballistic calculator
Takes 18650 batteries you can swap in the field
11 h of battery, 21st-longest of 344 here
Waterproof (IP67), survives a dunking
Records video and connects to a phone app

Against it