Thermal scopes/Sig/ECHO SV35-LRF
    Sig ECHO SV35-LRF thermal scope

    Sig

    ECHO SV35-LRF

    640-class sensor35 mm lens

    This sensor and lens combination pairs a broad scanning view with more detail on distant animals in our identification model. Its 30.5 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

    73.1#14 of 26in this category
    Image
    72
    Handling
    75
    Warranty
    90
    Score breakdown

    Key specs

    Resolution
    640×512 px
    Hog ID
    319 yd
    Field of view
    12.6°
    Weight
    30.5 oz
    $2,500Best price
    10 in-stock sellers

    Side by side

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    Compare price, image performance, and handling to see which tradeoffs suit your hunting. Start with these alternatives, or compare any scope in the full lineup.

    Compare specs.

    Sig ECHO SV35-LRF compared with RIX STORM S6R compared with DNT Hydra HS650 — key specifications
    Scope
    This scopeSig ECHO SV35-LRF64035 mm1.5×
    Similar setupRIX STORM S6R64035 mm2×
    Lower priceDNT Hydra HS65064050 mm2.5×
    At a glance
    Best price$2,500$2,599$2,199, advantage
    HuntGrade Score73.174.7, advantage72.4
    Overall rank#44 of 155#28 of 155, advantage#51 of 155
    Image
    Image score71.872.772.8, advantage
    Resolution640×512640×512640×512
    Objective lens35mm35mm50mm, largest lens
    Field of view12.6°, widest field of view12.5°8.8°
    Identification319 yd319 yd456 yd, advantage
    Handling
    Handling score74.676.7, advantage72.8
    Mounted weight31 oz16 oz, advantage22 oz (estimated)
    Runtime~11 hrs, advantage~4 hrs~4 hrs
    Laser rangefinderBuilt in, advantageBuilt in, advantageNo
    Warranty
    Warranty score90.0100.0, advantage64.0
    Term5 years, advantage5 years, advantage3 years
    TransferableNo — first owner onlyYes, advantageYes, advantage

    The reasoning

    What earns its score.

    See how each specification contributes to the ECHO SV35-LRF’s Image, Handling, and Warranty scores, and how those combine into its HuntGrade Score.

    Sig ECHO SV35-LRF

    Sig ECHO SV35-LRF

    640×512 sensor · 35 mm lens · 12 µm

    ImageImage71.8× 80% weight
    HandlingHandling74.6× 15% weight
    WarrantyWarranty90.0× 5% weight
    HuntGrade Score73.1

    Image

    71.8 pts
    Sensor resolution62.0 pts640×51250% of Image
    Animal detail89.8 pts319 yd ID15% of Image
    Field of view81.8 pts12.6° 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

    74.6 pts
    Mounted weight71.8 pts30.5 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 SV35-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 SV35-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.

    Buying options

    Where to buy.

    See how prices differ for the ECHO SV35-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
    $2,500
    Median price
    $3,750
    MSRP
    $3,999
    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 SV35-LRF
    Seller Shipping Returns Price Seller links
    SIG SauerFlat-rate shipping
    Ships in 1–2 business days
    		14-day returns$2,500Lowest priceVisit seller
    NatchezNot recorded60-day returns$3,223Visit seller
    OpticsPlanetFree shipping over $49
    Ships in 1–2 business days
    		30-day returns$3,319Visit seller
    EuroOpticFree shipping over $250
    Ships same dayOrder by 3:00 PM ET
    		15-day returns$3,500Visit seller
    ScopelistFree shipping over $250
    Ships same dayOrder by 4:00 PM ET
    		15-day returns$3,500Visit seller