The best thermal scopes in 2026
Our verdict for 2026: the AGM Rattler V3 LRF 35-640 (around $3,500) is the best thermal scope overall: a 640x512 sensor that AGM rates below 15 mK, a built-in 1,000 m laser rangefinder paired with an on-board ballistic calculator, and a 12.5 by 10.0 degree view from a 2.5x base, at 1.6 lb. The ATN ThOR 6 Elite 3-24x50 LRF (around $3,000) is the ATN choice: a 640x512 sensor, a built-in rangefinder and ballistic calculator, and 1.83 lb. The ATN Thor 5 XD LRF 4-40x (around $5,000) has the highest resolution here: its 1280x1024 sensor carries a little over four times the pixels of a 640x480 scope, for identifying animals far out in open country, at 2.5 lb. The DNT ThermNight TNC635R (around $2,800) adds a 1920x1080 day/night camera to a 640x512 thermal sensor in one scope.
Owner records are thin at this end of the market: the Rattler V3, ThOR 6 Elite and ThermNight listings carry 4, 11 and 2 OpticsPlanet reviews, and most of the Thor 5 XD 4-40x's 96 thank ATN's customer service rather than describe the scope. Check price and availability on OpticsPlanet; confirm the current price on the retailer page.
This guide covers performance thermal rifle scopes: 640 and 1280 sensors, a laser rangefinder and ballistic calculator built in, and, on one pick, a day/night camera behind the same eyepiece. The order follows our editorial score, which is our opinion of each scope formed from its specs, its trade-offs and the owner record (see how we review), so the most pixels is not automatically first. Detection ranges below are published figures for spotting a heat signature; identifying the animal happens much closer, which is where sensor resolution earns its price.
Shopping for the most thermal for the money? Our best budget thermal scope guide ranks the value picks, and our best thermal scope for coyote hunting ranks scopes for night predator work. Want a 384-resolution thermal under $2,000 and can range without a built-in rangefinder? See the AGM RattlerV2 35-384.
How these picks were made: a research-based roundup comparing published specifications from the retailer listings and the makers' own pages and manuals, sensor resolution and sensitivity, built-in rangefinders, batteries and owner reviews on OpticsPlanet. Where sources disagree we say so or leave the figure out. Scores are our editorial opinion, not a hands-on test of every model, and owner ratings are shown attributed to their source. Confirm current price on the retailer page. See how we evaluate.
Quick comparison
| Category | Pick | Spec | Price |
|---|---|---|---|
| Best overall | AGM Rattler V3 LRF 35-640 | 2.5-20x · 640x512 · LRF | around $3,500 |
| Best ATN 640 | ATN ThOR 6 Elite 3-24x50 640x512 LRF | 3-24x · 640x512 · LRF | around $3,000 |
| Highest resolution | ATN Thor 5 XD LRF 4-40x 1280x1024 | 4-40x · 1280x1024 · LRF | around $5,000 |
| Best thermal plus day/night | DNT ThermNight TNC635R 1.5-6x | 640x512 thermal + day/night · LRF | around $2,800 |
Specs side by side
| Pick | Sensor | Magnification | Objective | Rangefinder | Detection range | Battery | Owner rating (OpticsPlanet) |
|---|---|---|---|---|---|---|---|
| AGM Rattler V3 LRF 35-640 | 640x512 | 2.5x base, digital to 20x | 35 mm | Yes, 1,000 m | 2,480 m / 2,710 yd (AGM) | Up to 5.5 hr per NE-4400, two included (AGM) | 4.8/5 from 4 reviews |
| ATN ThOR 6 Elite 3-24x50 640x512 LRF | 640x512 | 3-24x (listed as one range) | 50 mm | Yes, on the LRF version; maximum range not published | Not published by ATN; the retailer lists 3,650 m | 9 hr (retailer); built-in battery plus a removable 18650 | 4.9/5 from 11 reviews |
| ATN Thor 5 XD LRF 4-40x 1280x1024 | 1280x1024 | 4-40x (listed as one range) | 100 mm | Yes, up to 1,000 yd (ATN manual) | 4,000 yd (ATN) | 10 hr per charge (ATN manual) | 4.8/5 from 96 reviews, mostly customer-service notes |
| DNT ThermNight TNC635R 1.5-6x | 640x512 thermal; 1920x1080 day/night camera | Thermal 1.5x base, digital to 6x; day/night 5x base, digital to 20x | 35 mm thermal focal length (DNT) | Yes, 5 to 1,100 m (DNT) | Not published | 5.5 hr with the IR off (DNT table); up to 5 hr in DNT's feature list | 4.5/5 from 2 reviews |
Detection range is the published figure for spotting a heat signature, not for identifying the animal, and is the maker's unless marked as the retailer's. "Not published" means we found no figure for that model in the sources we read. Owner ratings are OpticsPlanet's, shown attributed.
Best overall: AGM Rattler V3 LRF 35-640
2.5x base, digital zoom to 20x · 35 mm lens · 640x512 sensor, 12 micron · NETD under 15 mK · 2560x2560 OLED · 50 Hz · 1,000 m laser rangefinder with ballistic calculator · IP67 · 5.5 hr, two batteries · 1.6 lb
around $3,500exact price on OpticsPlanet
This is the best thermal scope overall for most night hunters: the highest editorial score on this page, a 640 sensor with a built-in rangefinder, a wider view than the two ATN picks and 1.6 lb. It puts a 1,000 m laser rangefinder in the lens and feeds it to an on-board ballistic calculator, on top of a 640x512 sensor that AGM rates below 15 mK and a 2560x2560 OLED display. AGM gives a 2.5x base with digital zoom to 20x and a field of view of 12.5 by 10.0 degrees, which suits woods, brush and fast follow-up shots, and rates detection at 2,480 m (2,710 yd); detection means spotting a heat source, and identifying it happens much closer. It comes with an ADM quick-detach mount and two NE-4400 batteries. The costs: AGM rates the battery at up to 5.5 hours, so a long sit means a swap, everything above the 2.5x base is digital zoom, and the owner record is four reviews.
Pros
- A 640x512 sensor that AGM rates below 15 mK, with a 2560x2560 OLED display
- A built-in 1,000 m laser rangefinder paired with an on-board ballistic calculator, so the range reading can turn into a hold
- A 12.5 by 10.0 degree view from a 2.5x base (AGM), wider than the 8.8 degrees of the Thor 5 XD 4-40x, for woods, brush and fast follow-up shots
- AGM lists an ADM quick-detach mount, two NE-4400 batteries, a charger and a case in the box, and says V2 and V3 batteries and chargers are compatible
Cons
- Battery life is rated at up to 5.5 hours on one NE-4400; two batteries come in the box, but long sits mean a swap
- Only 2.5x is optical; the 20x top end is digital zoom, so the image coarsens as you zoom
- The owner record is four reviews on this listing, too small to say much about long-term reliability
- The retailer listing lists a 5-year warranty, but we could not read AGM's own warranty terms, so confirm them before you buy
Best for: night hunters who cannot judge distance in the dark and want the rangefinder and ballistic calculator in a compact 640 scope. If you shoot close over a feeder, a RattlerV2 does the job for much less.
Key specifications
| Manufacturer | AGM Global Vision |
|---|---|
| Model | Rattler V3 LRF 35-640, part number RATT35-640-V3 |
| Thermal sensor | 640x512, 12 micron pixel pitch |
| Sensitivity (NETD) | Less than 15 mK |
| Lens | 35 mm |
| Magnification | 2.5x base, digital zoom to 20x (AGM) |
| Field of view | 12.5 x 10.0 degrees, 67 x 53 ft at 100 yards (AGM) |
| Display | 2560x2560 OLED |
| Refresh rate | 50 Hz |
| Detection range | 2,480 m / 2,710 yd (AGM) |
| Rangefinder | Built-in 1,000 m laser rangefinder, paired with an on-board ballistic calculator |
| Battery | One replaceable rechargeable NE-4400 lithium-ion battery, two included; up to 5.5 hours (AGM) |
| Water resistance | IP67 |
| Size and weight | 9.3 x 2.6 x 2.6 in, 1.6 lb |
“Very clear image even when increasing magnification. Features are very useful. Menu is easy to navigate.”
jeremy (SC), reviewer, via OpticsPlanet (35-640)
Best ATN 640: ATN ThOR 6 Elite 3-24x50 640x512 LRF
3-24x · 50 mm germanium lens · 640x512 sensor · 15 mK NETD · 1920x1080 display · built-in laser rangefinder and ballistic calculator · IP67 · 9 hr battery · 1.83 lb
around $3,000exact price on OpticsPlanet
This is the ATN to buy if you want a 640 sensor with ranging and ballistics inside the scope, lighter and cheaper than the Thor 5 XD. The retailer lists a 640x512 sensor with 15 mK thermal sensitivity behind a 50 mm germanium lens, a 1920x1080 display, IP67 and 1.83 lb, and ATN backs it with a five-year warranty. Power is a dual system: ATN's manual describes one built-in rechargeable battery and one removable 18650, and the retailer lists 9 hours of battery life. The longest owner review on the listing is from a verified owner who calls the image quality "remarkable" next to their old Thor 4 and lists the ballistic calculator among the pros, but who could not update the firmware and found the new controls frustrating at first. The listing also sells a standard row without the rangefinder; the price on this card is the LRF row, and the retailer's photo shows no rangefinder module.
Pros
- A 640x512 sensor with 15 mK NETD, by our arithmetic roughly three times the pixels of a 384x288 sensor
- A built-in laser rangefinder with ballistic calculator on the LRF version; ATN's manual lists calculator inputs from ballistic coefficient to wind
- A 1920x1080 display, IP67 and a magnesium alloy housing at 1.83 lb, per the retailer
- A five-year warranty from the original date of purchase, and a removable 18650 alongside the built-in battery (ATN manual)
Cons
- One verified owner could not update the firmware by USB or WiFi; ATN asks for more than 30% battery before any update
- The refresh rate is disputed (50 Hz on the retailer listing, 60Hz on ATN's page for the non-LRF version), so we print neither as fact for the LRF
- Eleven reviews, ten of them five stars, and one of them about a different model: too few to show a reliability pattern either way
- No maximum rangefinder distance on the ATN pages we read, and the retailer's package list names only the scope, so check what mounting hardware is included
Best for: night hunters who take longer shots and want a 640 sensor with the rangefinder and ballistic calculator in the scope. If you know your distances or carry a separate rangefinder, the same listing sells a version without one for less.
Key specifications
| Manufacturer | ATN |
|---|---|
| Model | ThOR 6 Elite 3-24x50mm, black, laser rangefinder row, MPN TIWST6650LRF |
| Sensor | 640x512 |
| Thermal sensitivity | 15 mK NETD |
| Display | 1920x1080; 0.49 in OLED (retailer feature list) |
| Magnification | 3-24x (listed as one range) |
| Objective lens | 50 mm |
| Eye relief | 50 mm |
| Detection range | 3,650 m (retailer; detection of a heat signature, not identification) |
| Laser rangefinder | Built in, with ballistic calculator, on the LRF version (retailer feature list) |
| Battery | Built-in rechargeable plus one removable 18650 (ATN manual); 9 hours battery life (retailer) |
| Water resistance | IP67 |
| Housing | Magnesium alloy |
| Weight | 1.83 lb |
| Mount | 30mm tube |
| Warranty | 5 years from original date of purchase; supplied rechargeable batteries 6 months (ATN manual) |
“The integrated LRF compared to the Bluetooth ABL 1000 is a very nice upgrade and improves the balance of the rifle.”
Jim (TX), Verified Owner, Elite 3-24x50 LRF, via OpticsPlanet
Highest resolution: ATN Thor 5 XD LRF 4-40x 1280x1024
4-40x · 100 mm lens · 1280x1024 sensor, 12 micron · 1024x768 display · 60 Hz · built-in laser rangefinder to 1,000 yd · 10 hr battery · 2.5 lb
around $5,000exact price on OpticsPlanet
This is the pick when identifying an animal far out in open country matters more than weight or price. Its 1280x1024 sensor carries a little over four times the pixels of a 640x480 scope, so you can zoom further before an animal turns into blocks, and ATN builds a laser rangefinder (rated up to 1,000 yards in ATN's manual), a ballistic calculator, One Shot Zero and recoil-activated video into the same body. The 100 mm lens gives an 8.8 degree field of view, and ATN rates detection at 4,000 yards; treat that as spotting a warm spot on the screen, not identifying it. The costs are real: a listed weight of 2.5 lb, a learning curve that reviewers describe, and reliability reports on the smaller XD sizes. Its 4.8 from 96 OpticsPlanet reviews is weaker evidence than it looks: 72 of those reviews name the same ATN customer-service representative, so they tell you ATN's support answers the phone, not how this scope performs.
Pros
- A 1280x1024 sensor with 12 micron pixels, a little over four times the pixels of a 640x480 scope and the highest resolution on this page
- A built-in laser rangefinder rated up to 1,000 yards (ATN manual) feeds the ballistic calculator, alongside One Shot Zero and recoil-activated video
- ATN rates detection at 4,000 yards through the 100 mm lens, built for long looks across open ground from a fixed position
- ATN rates the battery at 10 hours per charge, charges over USB-C, and gives a 5-year warranty from the date of purchase (ATN manual)
Cons
- Listed at 2.5 lb, the heaviest pick here, which suits a stand, a tripod or a bench better than a long walk
- The most expensive pick here
- The 4.8 from 96 reviews is mostly customer-service thanks: 72 of them name the same ATN rep, so it says little about the scope itself
- Reliability reports exist on the XD line: one 2-20x reviewer sent it for warranty repair twice in five months
- It is a computer on a rifle: reviewers describe a learning curve, and ATN warns a power loss during a firmware update may crash it
Best for: open-country hunters who need to identify animals at long range from a fixed position and accept the weight and the price. If your shots are closer, the ThOR 6 Elite and the Rattler V3 put a 640 sensor and a rangefinder in a lighter scope for less.
Key specifications
| Manufacturer | ATN |
|---|---|
| Model | Thor 5 XD LRF 4-40x, black, MPN TIWST51210LRF |
| Sensor | 1280x1024, 12 micron pixels |
| Display | 1024x768 |
| Refresh rate | 60 Hz |
| Magnification | 4-40x (listed as one range; the listing does not split optical from digital zoom) |
| Objective lens | 100 mm |
| Field of view | 8.8 degrees |
| Eye relief | 90 mm |
| Laser rangefinder | Built in, up to 1,000 yards (ATN manual) |
| Detection range | 4,000 yd (ATN; detection of a heat signature, not identification) |
| Battery | Lithium ion; 10 hours per charge (ATN manual) |
| Weight | 2.5 lb |
| Warranty | 5 years from date of purchase (ATN manual) |
Best thermal plus day/night: DNT ThermNight TNC635R 1.5-6x
Thermal: 640x512, 12 μm, ≤18 mK, 1.5x base, digital to 6x · Day/night: 1920x1080 camera, 5x base, digital to 20x · Rangefinder 5 to 1,100 m · 1920x1080 Micro-OLED display · IP67 · 5.5 hr with the IR off · 724 g
around $2,800exact price on OpticsPlanet
This is the pick if you want a thermal sensor and a digital day/night camera behind one eyepiece, plus a laser rangefinder and a ballistic calculator. On DNT's figures the thermal channel is a 640x512 sensor (12 μm, ≤18 mK at 25°C) on a 35 mm focal length with a 1.5x base, which gives it the widest thermal view of the three ThermNight models at 12.52 degrees, and the day/night camera is 1920x1080 and zooms digitally from 5x to 20x. DNT lists the rangefinder at 5 to 1,100 m (5 to 1,200 yd). What to know first: you zero the thermal and day/night channels separately, the two views are switched or shown picture in picture rather than blended, some of DNT's own figures disagree with each other, and the listing shows two OpticsPlanet reviews. DNT's warranty table gives 3 years, or 5 years with product registration, and its policy excludes products obtained from unauthorized channels, so confirm the seller's status with DNT before you count on the extended term.
Pros
- A 640x512 thermal sensor (≤18 mK at 25°C) with the widest thermal view of the three ThermNight models, 12.52° x 10.02° (DNT)
- A 1920x1080 day/night camera (Sony STARVIS 2 CMOS, per DNT's series page) with a 5x base and digital zoom to 20x, plus a detachable IR illuminator
- A rangefinder DNT lists at 5 to 1,100 m (5 to 1,200 yd), with an on-board ballistic calculator and up to five profiles synced from the DNT app
- DNT lists a 0 MOA and a 20 MOA Picatinny mount, two 21700 batteries, a charger and a sunshade in the box
Cons
- Two zeros to keep: DNT's manual has you zero the thermal and day/night channels separately
- No blended image: you switch channels or use picture in picture
- DNT's own battery figures disagree: up to 5 hours in its feature list, 5.5 hours with the IR off in its table
- No published rangefinder accuracy, laser class or thermal aperture
- A thin owner record: two OpticsPlanet reviews, one from a reviewer who had not yet mounted it
Best for: hunters who want thermal detection and a day/night camera image in one scope and accept two zeros and 724 g. For thermal alone, the ThOR 6 Elite and the Rattler V3 are dedicated 640 scopes with rangefinders.
Key specifications
| Manufacturer | DNT Optics |
|---|---|
| Version carded | TNC635R, Black |
| Thermal: sensor | 640x512, 12 μm |
| Thermal: NETD | ≤18 mK at 25°C |
| Thermal: frame rate | 50 FPS |
| Thermal: lens focal length | 35 mm |
| Thermal: base and digital zoom steps | 1.5x; 1.5x, 2.25x, 3x, 3.75x, 4.5x, 5.25x, 6x |
| Thermal: field of view | 12.52° x 10.02° |
| Day/night: camera | Sony STARVIS 2 CMOS, 1920x1080, 60 Hz |
| Day/night: zoom | 5x base, digital to 20x |
| Display | Micro-OLED, 1920x1080, 60 Hz |
| Eye relief | 65 mm |
| LRF: range | 5 to 1,100 m / 5 to 1,200 yd |
| Battery (one in use) | 21700 flat-top; 5.5 h with the IR off |
| Sealing | IP67 |
| Weight | 724 g / 25.6 oz |
| Warranty (DNT table) | 3 years; 5 years with registration |
Resolution explained: 256 vs 384 vs 640 vs 1280
Sensor resolution is the number of thermal pixels, and it decides how far you can zoom before an animal turns into blocks. By our arithmetic, a 256x192 sensor has about 49,000 pixels, 384x288 about 111,000, 640x512 about 328,000 and 1280x1024 about 1.31 million.
- 256x192 and 384x288 are the budget tiers, covered in our best budget thermal scope guide, not here. A 384x288 sensor has about a third of the pixels of a 640x512 one.
- 640x512 is the AGM Rattler V3 LRF 35-640, the ATN ThOR 6 Elite and the DNT ThermNight TNC635R's thermal channel: roughly three times the pixels of a 384x288 sensor.
- 1280x1024 is the ATN Thor 5 XD: four times the pixels of a 640x512 sensor. Its display is 1024x768, so the extra detail shows most as you zoom in and in recorded video.
Sensitivity (NETD) is the other half of image quality: a lower mK figure separates smaller temperature differences, so a warm animal stands out from a background of similar temperature. AGM rates the Rattler V3 below 15 mK, the retailer lists 15 mK for the ThOR 6 Elite and DNT lists ≤18 mK at 25°C for the ThermNight TNC635R. ATN does not publish a NETD figure for the Thor 5 XD on the pages we read.
How to choose a thermal scope
A few things matter more than the headline magnification number:
- Optical base versus digital zoom. Magnification above the base is digital zoom, which adds no detail the sensor did not capture. AGM gives the Rattler V3 a 2.5x base and the ThermNight's thermal channel has a 1.5x base (DNT), while the Thor 5 XD and ThOR 6 Elite listings give one range without splitting it.
- A built-in rangefinder. Every pick here has one, feeding a ballistic calculator, so a range reading can turn into a hold. On the ThOR 6 Elite listing only the LRF version has it.
- Weight. The Thor 5 XD is listed at 2.5 lb, the ThOR 6 Elite at 1.83 lb, the Rattler V3 at 1.6 lb and the ThermNight TNC635R at 724 g. That matters more on a walk than on a stand.
- Batteries. The Rattler V3 is rated at up to 5.5 hours per battery and the ThermNight at 5.5 hours with the IR off (up to 5 hours in DNT's feature list); the Thor 5 XD at 10 hours and the ThOR 6 Elite at 9 hours (retailer). The Rattler V3 and ThermNight come with two batteries, and the ThOR 6 Elite pairs a built-in battery with a removable 18650.
- Thermal plus day/night. The ThermNight adds a day/night camera, but each channel is zeroed separately and the views are switched or shown picture in picture, not blended.
Comparing AGM's RattlerV2 models? See which AGM Rattler V2 to buy. Want a handheld scanner instead of a weapon-mounted optic? See our best thermal monoculars or, to scan with both eyes, our best thermal binoculars. Already run a good day scope and want to add night capability without giving it up? See our best thermal clip-on. Prefer a detailed image and daytime use over pure heat detection? See our best night vision scopes. Deciding on the technology? Read thermal vs night vision. New to zeroing an optic? See how to sight in a rifle scope. Hunting by day too? Compare our best rifle scopes and best hunting rangefinders.
FAQ
What is the best thermal scope overall?
The AGM Rattler V3 LRF 35-640 is our best thermal scope overall: a 640x512 sensor that AGM rates below 15 mK, a built-in 1,000 m laser rangefinder paired with an on-board ballistic calculator, and a 12.5 by 10.0 degree view from a 2.5x base, at 1.6 lb. The ATN ThOR 6 Elite 3-24x50 LRF is the ATN choice: a 640x512 sensor, a built-in rangefinder and ballistic calculator, and 1.83 lb. For the most detail at long range, the ATN Thor 5 XD LRF 4-40x has a 1280x1024 sensor, a little over four times the pixels of a 640x480 scope, but is listed at 2.5 lb. The DNT ThermNight TNC635R adds a day/night camera to a 640x512 thermal sensor.
Is a 1280 thermal sensor worth it over a 640?
Only if you need to identify animals far out. By our arithmetic a 1280x1024 sensor has about 1.31 million pixels, four times a 640x512 sensor's 328,000, so you can zoom further before an animal turns into blocks. Two cautions: the Thor 5 XD shows that sensor on a 1024x768 display, so the extra detail pays off mostly as you zoom in and in recorded video, and it is listed at 2.5 lb against 1.83 lb for the ThOR 6 Elite and 1.6 lb for the Rattler V3. For shots inside a few hundred yards, a 640 sensor is the better balance.
How far do the built-in rangefinders reach?
ATN's Thor 5 manual rates the Thor 5 rangefinder up to 1,000 yards. AGM rates the Rattler V3 LRF 35-640 rangefinder to 1,000 m. DNT lists the ThermNight TNC635R at 5 to 1,100 m (5 to 1,200 yd). We did not find a maximum ranging distance for the ThOR 6 Elite LRF on the ATN pages we read. In each scope the range feeds a ballistic calculator.
How long do the batteries last?
ATN rates the Thor 5 at 10 hours per charge. The retailer lists 9 hours for the ThOR 6 Elite, which ATN's manual says runs on a built-in battery plus a removable 18650. AGM rates the Rattler V3 at up to 5.5 hours per NE-4400 battery, with two in the box. DNT's table gives the ThermNight TNC635R 5.5 hours with the IR illuminator off, while its feature list says up to 5 hours.
Can one scope do thermal and day/night?
Yes. The DNT ThermNight TNC635R puts a 640x512 thermal sensor and a 1920x1080 day/night camera behind one eyepiece. DNT's manual says you zero the thermal and day/night channels separately, and you switch between the two views or show them picture in picture rather than blended. Always confirm night-hunting and optic regulations for your state and species before you hunt.
Related: best rifle scopes · best hunting rangefinders · best red dot sights.