Thermal scopes/Sig/ECHO SV50-LRF
    Sig ECHO SV50-LRF thermal scope

    Sig

    ECHO SV50-LRF

    640-class sensor50 mm lens

    This sensor and lens combination favors identifying animals farther away, trading a broad scanning view for a narrower view of distant targets. Its 31.3 oz mounted weight and 11-hour listed runtime are worth weighing together for longer nights. Compare current offers and the alternatives below to see what a change in price buys you.

    HuntGrade Score

    72.9#17 of 35in this category
    Image
    72
    Handling
    74
    Warranty
    90
    Score breakdown

    Key specs

    Resolution
    640×512 px
    Hog ID
    456 yd
    Field of view
    8.8°
    Weight
    31.3 oz
    $4,229Best price
    10 in-stock sellers

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    Compare specs.

    Sig ECHO SV50-LRF compared with Sig ECHO RV50-LRF compared with InfiRay Hybrid Compact 640 3.5x 50mm — key specifications
    Scope
    This scopeSig ECHO SV50-LRF64050 mm2×
    Similar setupSig ECHO RV50-LRF64050 mm2.5×
    Lower priceInfiRay Hybrid Compact 640 3.5x 50mm64050 mm3.5×
    At a glance
    Best price$4,229$4,000$3,500, advantage
    HuntGrade Score72.972.773.5, advantage
    Overall rank#45 of 155#47 of 155#40 of 155, advantage
    Image
    Image score71.771.772.4, advantage
    Resolution640×512, advantage640×512, advantage640×480
    Objective lens50mm50mm50mm
    Field of view8.8°, widest field of view8.8°, widest field of view7.3°
    Identification456 yd456 yd547 yd, advantage
    Handling
    Handling score73.872.274.1, advantage
    Mounted weight31 oz35 oz26 oz, advantage
    Runtime~11 hrs~12 hrs, advantage~7 hrs
    Laser rangefinderBuilt inBuilt inBuilt in
    Warranty
    Warranty score90.090.090.0
    Term5 years5 years5 years
    TransferableNo — first owner onlyNo — first owner onlyNo — first owner only

    The reasoning

    What earns its score.

    See how each specification contributes to the ECHO SV50-LRF’s Image, Handling, and Warranty scores, and how those combine into its HuntGrade Score.

    Sig ECHO SV50-LRF

    Sig ECHO SV50-LRF

    640×512 sensor · 50 mm lens · 12 µm

    ImageImage71.7× 80% weight
    HandlingHandling73.8× 15% weight
    WarrantyWarranty90.0× 5% weight
    HuntGrade Score72.9

    Image

    71.7 pts
    Sensor resolution62.0 pts640×51250% of Image
    Animal detail98.1 pts456 yd ID15% of Image
    Field of view72.9 pts8.8° horizontal FOV15% of Image
    Sensitivity86.0 pts20 mK10% of Image
    Optics72.0 ptsf/1.25% of Image
    Screen57.5 pts1024×768 · 50 Hz5% of Image

    Handling

    73.8 pts
    Mounted weight70.6 pts31.3 oz60% of Handling
    Battery life86.0 pts11 hours20% of Handling
    Water resistance95.0 ptsIP6710% of Handling
    Eye relief48.0 pts45 mm10% of Handling

    Warranty

    90.0 pts
    Electronics coverage100.0 pts5 years90% of Warranty
    Transferability0.0 ptsOriginal owner only10% of Warranty
    Explore the full methodology

    Behind the scope

    Get to know Sig.

    See where the ECHO SV50-LRF fits in Sig’s lineup. Explore the product families, compare configurations and prices, and learn about the company behind the scope.

    1 families · In-stock price ranges

    This scope’s family
    Sig ECHO SV50-LRF

    ECHO

    5 scopes

    SIG’s compact thermal line, from basic setups to versions with a built-in rangefinder.

    $2,100–$4,229
    View all 5 scopes

    ECHO names a family, not a sensor maker.

    Our research has not established the sensor supplier for every ECHO scope. App connectivity, ballistic features and thermal specifications should be checked on the exact model.

    Read the electronics coverage.

    SIG’s warranty distinguishes its optical and mechanical coverage from electronic components. The electronic component policy is the relevant starting point for a thermal purchase.

    Explore Sig

    Explore the families, compare prices with similar scopes, and learn about the company behind them.

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    Buying options

    Where to buy.

    See how prices differ for the ECHO SV50-LRF, and what each seller offers for the money.

    Buying insights

    Compare listed prices, then weigh each seller’s shipping and return policies.

    Best price
    $4,229
    Median price
    $4,500
    MSRP
    $4,499
    In-stock sellers
    10

    Compare sellers

    Prices verified October 2026, seller terms August 2026. HuntGrade may earn an affiliate commission. How we make money

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    In-stock buying options for Sig ECHO SV50-LRF
    Seller Shipping Returns Price Seller links
    OpticsPlanetFree shipping over $49
    Ships in 1–2 business days
    		30-day returns$4,229Lowest priceVisit seller
    MidwayUSAFree shipping over $100
    Ships same dayOrder by 1:00 PM CT
    		90-day returns$4,500Visit seller
    EuroOpticFree shipping over $250
    Ships same dayOrder by 3:00 PM ET
    		15-day returns$4,500Visit seller
    ScopelistFree shipping over $250
    Ships same dayOrder by 4:00 PM ET
    		15-day returns$4,500Visit seller
    BrownellsCalculated at checkout
    Ships in 1–2 business days
    		120-day returns$4,500Visit seller