Description
The SIG SAUER ECHO MV50-LRF is a thermal rangefinding monocular that does two jobs at once: it shows you heat where your eyes see nothing, and it tells you how far away that heat is. At its core sits an LWIR 640×512 VGA, 12-micron, 50Hz thermal sensor with under 20mK sensitivity, which is a fancy way of saying it picks up tiny temperature differences and turns them into a clean, detailed image instead of a muddy blur. With 3-24x magnification and eight selectable color palettes, you can dial in the view for whatever you're scanning, from open water to a treeline.
What the Integrated Rangefinder Brings to the ECHO MV50-LRF
The standout here is the LIGHTWAVE DSP GEN II laser rangefinder built right into the objective, reaching out to 1,000 yards. That means fast, precise distance reads without carrying a separate unit. Pair it with the BDX 2.0 mobile app and Applied Ballistics Ultralight, and the MV50-LRF can hand you custom ballistic solutions. When connected to a compatible ECHO riflescope, it even pushes holdover info straight to the reticle of your optic.
Power and Build on the ECHO MV50-LRF
Runtime is a strong point. The monocular draws from an internal reserve cell plus a removable 18500 lithium-ion battery, giving you up to 10 hours in the field, and it ships with two 18500 cells so you always have a spare charged and ready. The housing carries an IP67 waterproof rating along with LensArmor abrasion-resistant coatings, so rain, dust, and the occasional knock won't slow it down. At 7.6 inches long and right around 19.8 ounces without a battery, it stays compact and easy to pack.
Capturing the Action with the ECHO MV50-LRF
This one records too. You can capture still photos and video with audio, then view or share it in real time through the BDX 2.0 app. The high-visibility orange finish makes it easy to spot in a gear bag or on deck, and the whole package is backed by SIG SAUER's Infinite Guarantee.
Key Specifications
- Manufacturer: SIG SAUER
- Model: ECHO MV50-LRF
- Manufacturer Part Number: SOEC42310OR
- UPC: 798681735280
- Magnification: 3-24x
- Objective Lens: 50mm
- Thermal Core: LWIR 640×512 VGA, 12µm, 50Hz
- Thermal Sensitivity: Under 20mK
- Laser Rangefinder: LIGHTWAVE DSP GEN II, 1,000-yard
- Field of View: 8.7 degrees
- Color Palettes: 8 selectable
- Recording: Still photo and video with audio
- Connectivity: BDX 2.0 enabled, Applied Ballistics Ultralight
- Battery: Internal plus replaceable external 18500 lithium-ion
- Runtime: Up to 10 hours
- Overall Length: 7.6 inches
- Weight: 19.8 oz without battery
- Waterproof Rating: IP67
- Color: Orange
What’s Included
- ECHO MV Thermal Monocular
- EVA zippered case
- (2) 18500 lithium-ion rechargeable batteries
- USB-C to USB-C data cable
- Lens cloth
- Quick reference instructions
Frequently Asked Questions
How far can the ECHO MV50-LRF rangefinder read distances?
The integrated LIGHTWAVE DSP GEN II laser rangefinder reaches out to 1,000 yards. It's built right into the objective lens, so you get fast, precise distance reads without carrying a separate unit. That combination of thermal detection and ranging makes it a complete targeting setup in one hand.
What kind of battery life does the ECHO MV50-LRF get?
You can expect up to 10 hours of runtime, which is among the longest in its class. It pulls power from an internal reserve cell plus a removable 18500 lithium-ion battery, and it ships with two 18500 cells so you can swap in a fresh one and keep going. That setup is handy for long nights afield or full days on the water.
Can the ECHO MV50-LRF connect to a riflescope or phone?
Yes. It's BDX 2.0 enabled and runs Applied Ballistics Ultralight, so it can deliver custom ballistic solutions through the mobile app. When paired with a compatible ECHO riflescope, it communicates holdover info straight to the reticle of your optic, and the app lets you view or share photos and video in real time.
Is the ECHO MV50-LRF waterproof?
It carries an IP67 waterproof rating, so it shrugs off rain, dust, and moisture in demanding conditions. The lenses also use LensArmor abrasion-resistant coatings to keep the image sharp and clear. That durability is a big reason this orange model fits marine and field use alike.





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