Sig Sauer ECHO RV35 — 640×512 thermal riflescope

How far you can see a person

112 m make out detail182 m tell what it is729 m spot it

501002005001k2k5k m

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

Sig SauerRiflescope · 640-class

Sig Sauer ECHO RV35

Approx. price: ~$3,500
Sensor: 640×512 · 12 µm
Lens: 35 mm · 2×
Weight: 31.7 oz

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Best for

A dedicated night rifle for hogs and coyotes inside about 150 yards

01Specifications

As published by Sig Sauer. Sources: sigsauer.com ECHO-R operator's manual PDF (spec table SKU SOEC32200: 2-16x, FOV 12.5 deg, 640x512 12 um 50 Hz, <=20 mK, OLED 1024x768, 12 h internal + 18500, 'IPX67'; the measurements table gives 14.8 in, 375 mm and 31.7 oz, 900 g for the two 35 mm models together), sportsmans.com ($3,499.99, in stock; confirms 14.8 in; sigsauer.com product page 403 to fetchers, Sig's own listed price per search index is $2,999.99).

Sensor: 640×512
Pixel pitch: 12 µm
NETD: ≤20 mK
Refresh rate: 50 Hz
Lens: 35 mm
Base magnification: 2×
Digital zoom: up to 16×
Field of view: 12.5° horizontal
Display: 1024x768 OLED
Run time: 12 h
Battery type: Internal + removable
Weight: 31.7 oz
Length: 14.8″
Laser rangefinder: No
Ballistic calculator: No
Records video: Yes
Wi-Fi: Yes
IP rating: IP67
Warranty: Infinite Guarantee
Approx. price: ~$3,500

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)
Swappable battery pack, so a spare doubles the run time
12 h of battery, 8th-longest of 344 here
Waterproof (IP67), survives a dunking
Records video and connects to a phone app

Against it