Phone: 800.769.0159
Contact Us

IR Hunter MK III 35mm 2.5X - 20X Thermal Rangefinding Weapon Sight


Out of stock

Free Shipping
UPC: 719307800700
Device Technology: Thermal Imaging
Sensor Resolution: 640x480
Optical Magnification: 2.5X
Digital Magnification: 8X
Sensor Pixel Size: 12 Micron
Sensor Frame Rate: 60hz
Objective Focal Length: 35mm
Objective F#: 1.2
Detection Range: 1800

IR Hunter MK3 2.5X-20X 35mm Thermal Weapon Sight


The IR Hunter line of thermal weapon sights are designed and built by an American company comprised of industry experts, shooting enthusiasts, and technicians obsessed with high quality thermal imagery.The IR Hunter MK III by IR defense is a direct response to customer feedback and requests to enhance the incredibly popular IR Hunter MK II.


The IR Hunter MK III features a new stadiametric RangeFinder, more reticle options, multiple savable reticle locations with x/y Readouts, come standard with the battery extender, a dual-lever LaRue mount and flip-up lens cap. The IR Hunter can be set to 30hz or 60hz, has a built in auto-dimmer, image capture, edge detect mode and more.


The BAE 12 micron imagery is truly amazing and produces some of the most crisp thermal images every seen on the commercial market. The MK III also has dynamic reticles so they keep proper ballistic calculations on every zoom level. There's even a subtension reticle for ranging and a clip-on mode so you can use the MK III with compatible day optics! If you are interested in recording thermal video for your IR Hunter we have ruggedized custom made video cables designed just for the MK III. We offer IR Hunter rentals to try before you buy and have a variety of IR Hunter videos for pre-purchase evaluation.

The MK III uses a 12 Micron BAE Micro core and a menu level system in conjunction with turrets to make operation intuitive and fast. The IR Hunter can be set to 30hz or 60hz, has a built in auto-dimmer, image capture, edge detect mode and more. The BAE 12 micron imagery is truly amazing and produces some of the most crisp thermal images ever seen on the commercial market.
The MK III also has dynamic reticles so they keep proper ballistic calculations on every zoom level. There's even a subtension reticle for ranging and a clip-on mode so you can use the MK III with compatible day optics! If you are interested in recording thermal video for your IR Hunter we have ruggedized custom made video cables designed just for the MK III.
We offer IR Hunter rentals to try before you buy and have a variety of IR Hunter MK III videos for pre-purchase evaluation.


  • LaRue Dual Lever QD Mount
  • Flip-Up Lens Cap
  • Eyeguard
  • Tactical Soft Case
  • QRG Guide
  • Download Cable/Software
  • Battery Extender
  • 2 - CR123A Batteries

IR Hunter MK III includes all of the features on the MK II plus:
  • Stadiametric Rangefinder
  • 5 Reticle Patterns
  • Reticle Position ReadOuts
  • Multiple Reticle Save Locations
  • Battery Extender
  • Flip-Up Lens Cap
  • Dual Lever LaRue Mount

Edge Detect Mode
The IR Hunter MK III has an Edge Detection feature that produces an entirely different new way of viewing your target. Edge Detect mode is also a fraction of the brightness of other modes so your eyes are not as prone to night blindness after coming off the scope. There are certain tactical situations that require your display to me very dim so as not to be detected, and to reduce night blindness after coming off of your eye piece. The IR Hunter MK III has an advanced feature that has been used on certain high end military thermal sights for years. Edge Detect gives you an entirely different way to view your target, with 90% of the screen black, and only the edges surrounding your target white. This is an extremely useful feature and is not found on any other commercially available thermal weapon sights.

Reticle Position ReadOuts
Not only can you save 4 weapon sight reticle locations and 4 clip-on scene locations, but each one of those locations will give you a simple X and Y value for as many locations as you need. This means that you can set up a MK III on as many weapon systems as you want and always maintain a return to zero.

MAXPOL Polarity - White Hot/Black Hot
Most thermal weapon sights come with only one level of white hot and black hot. Some come with color pallets, but the majority of users find themselves using black hot and white hot exclusively. Rather than giving you color pallets that you will most likely never use, IR Defense designed the IR Hunter with 3 levels of white hot, and 3 levels of black hot. This allows you to choose the perfect level of polarity in the white hot or black hot modes for any situation.


ETR - Enhanced Target Recognition
The IR Hunter features an extremely benefitial technology called Enhanced Target Recognition, or ETR. Most thermal systems auto adjust the image contrast and brightness across the entire display screen. This can lead to washed out image around the crosshair or for a majority of the display area. ETR selects the are on the display to adjust leaving you with a perfectly adjusted image.

DFC - Digital Focus Control
Digital focus control allows you to not only focus your picture to the optimum setting, but it also allows sharpening of the entire picture. This technology will make a 320x240 appear more like a 640x480. For a detailed look at what DFC can do to image quality look at the image below. This image is raw, unedited, and is not a simulation

digital focus control for thermal scope

Protective Lens Window
The germanium lens can be the most costly component on a thermal device and it is always the most costly component that is exposed to damage from the elements. IR Defense designed a highly transmissive IR window that protects your germanium lens and can be replaced. Replacing the protective window will only cost a fraction of replacing the entire germanium lens.

image of hunter using IR Defense scope

IR Hunter Menu Operation

The IR Hunter MK III has 3 turret controls that operate the menu levels and functions. The turret controls operate the menu icons corresponding to their location(top turret operates the top menu icons etc).

The menu levels are numbered from 1-8 and each level has different functions.

Level 1 controls the 6 polarity settings, edge detect and digital zoom.
Level 2 controls contrast and digital focus control(DFC).
Level 3 controls calibration and brightness.
Level 4 controls reticle selection, clip-on mode and adjusts the rangefinder.
Level 5 controls windage and elevation adjustments,
Level 6 controls image capture and Enhanced Target Recognition(ETR)
Level 7 allows you to review captured images.
Level 8 controls the reticle lock, framerate(30hz or 60hz), video output, symbol sleep mode, startup settings, battery settings,display auto dimmer, deleting captured images, reticle location(A.B,C,D) and horizontal and vertical rangefinder units.

Video Output
The IR Hunter features a high end mil-spec Fischer connector. This connector costs much more than connectors on competing scopes, but IR Defense decided to choose a video connection option that will last under harsh environments and years of abuse. Video cables and connector quality is very important both in tactical and hunting/recreational situation. One flaw in a cable can leave you wishing you had your kill shot on video. We have a high quality custom video cable for the IR Hunter MK III that connects the MK III directly to a mini DVR. These cables are rugged and built to last.

IR Hunter Right Angle Cable

Since the launch of the IR Hunter we here at UNV have seen IR Defense deliver every scope with a high level of quality control and customer service. We not only sell the IR Hunter MK III, we use the IR Hunter MK III on a frequent basis educating customers and night hunting.

The IR HUNTER has been designed and built by a team that has been delivering great thermal sights, industry-wide, for 20 years. Not just technicians, the IR HUNTER designers are enthusiastic, American Shooters as well. We passionately demand reliability and precision from our optics when putting rounds down range no matter the weather conditions, nor the time of day. This drive and commitment lead us to make the best possible thermal scope,and, we did it! It was achieved,100% here in the USA, and without compromising quality or reliability. That would typically be enough; but the team went a step further, introducing the IR HUNTER thermal weapon sight to market for a highly competitive price. IR HUNTER contains all the features and ergonomics you have wanted, combined into a sleek system made to securely fit onto your rifle. You should find comfort operating the IR Hunter's Turret Knob controls as they are located where you expect them to be, same as your day optics.

  • 640x480 BAE MicroIR Thermal Core
  • 12 Micron Technology
  • Emagin OLED Display
  • 60hz Fast Frame Rate
  • Clip-On Capability with 1X day optic
  • 40% power savings for longer battery life
  • 3-Year Warranty


  Sensor Type 640x480 MicroIR BAE 12um thermal engine
  Sensor Resolution 640x480 (actual 640x512) 327,680 pixels
  SpectralL Band 7.5 - 13.5 um
  Pixel Pitch 12 micron
  Sensitivity <50 mK at f/1.0
  Frame Rate 60HZ
  Calibration NUC (Non Uniformity Correction)
  Lens Type Germanium
  IR Window Germanium with Protective DLC Coating
  Focal Length 35mm
  F/# f/1.2 35mm
  Eye Relief 2.00"
  Diopter -1.5
  Type Emagin OLED
  Resolution 640x480
  Output 24 bit Digital RGB
  Contrast >100:1
  Frame Rate 60HZ(30hz selectable for longer battery life)
  Magnification 640x480 35mm - 2.5x optical 20x digital
  Field of View 640x480 35mm - 12 optical 1.5 digital
  Dimensions 7.4" L x 2.9" H x 3.1" W 35MM Systems
  Weight >840 grams 35MM Systems
  Start Up Time >4 Seconds
  Reticle Type Digital System
  Reticle Selection 6 types
  Reticle Adjustments Calibrated MOA in both windage and elevation
  Reticle Colors White, Black
  Turret Knobs Mechanical Adjusters (MOA Calibrated)
  Polarity White Hot / Black Hot
  Video Output RS-170 NTSC Analog Video Special Cable required
  Digital Focus Enhances and Sharpens Imagery
  Electronic Zoom 1x to 8x
  EPC Enhanced Picture Control Fine Tunes Your Screen Image
  Image Capture 100+ Images special cable needed to download
  • Display



    Display Type

    eMagin OLED

    Video Output

    Analog RS-170/NTSC

    Image Capture

    100 640x480 JPEG/BMP

    Onboard Recording






    Recoil Rating

    .308 WIN

    Country of Manufacture


  • Environmental Specifications

    Operating Temperature Range

    -40C/-40F to +55C/131F

    Storage Temperature Range

    -45C/-49F to +75C/167F

    Power Source

    2 or 3 CR123A Lithium

    Run Time

    3 - @ 30 HZ 6 hrs;2 - @ 60hz 3.5 hrs; UNV Adapter @ 60hz 18 hrs+

  • Lens Specifications

    Optical Magnification


    Digital Magnification


    Objective Lens Material

    Umicore GASIR

    Housing Material

    7000 series Aluminum/ABS



    Objective Focal Length


    Objective F#


    Focusing Mechanism


    Horizontal Angular Field of View


    Vertical Angular Field of View


    Detection Range


    Eyepiece Focal Length


    Eye Relief


    Exit Pupil


    Diopter Range

    -6 to +2

    Connector Type

    9 Pin Fischer

    Connector Output




    Startup Time

    Under 5 Seconds

  • Physical

    Length in/mm

    7.4 /188

    Width in/mm

    3.1 /79

    Height in/mm

    2.9 /74

    Weight lb/gr

    2.18 lbs / 34.9 oz / 989 g

  • Sensor Specifications

    Device Technology

    Thermal Imaging

    Sensor Resolution


    Sensor Pixel Size

    12 Micron

    Sensor Frame Rate


    Thermal Sensitivity


    Spectral Response

    8-12 Microns

    Sensor Type

    BAE MicroIR Core

6 Reviews Hide Reviews Show Reviews

  • 5
    Mk3 35mm

    Posted by B.Dustin on Dec 26th 2018

    Absolutely worth the money! I bought the trijicon mk3 35mm thermal scope after quite a bit of research and it is every bit as good as the online videos. With the extras (DVR and extended battery) makes it worth the price. The service at UNV is second to none. The guys were very patient and knowledgeable with my many questions and concerns. Being a disabled Veteran and father of 6 I couldn’t afford to pay for something I that wouldn’t meet my expectations and I’m not disappointed!
    Originally had looked at getting the pulsar trail xp50 which my buddy decided to purchase , it’s good but my buddy is jealous of my mk3.

  • 5
    Blown away...

    Posted by Gary Miller on Feb 21st 2016

    I admit my experience with thermal imaging is limited to my only looking through a friends two year old ATN scope a couple of times and for a couple of minutes each time and don&#039;t know any of it&#039;s specs, just the brand. I did a ton of research though before going a different route with the IR Hunter MKIII. And I am simply blown away by it! My friend and I compared them sided by side this weekend and he is blown away by it too. The image is super crisp and clean and smooth no matter how fast I turn from side to side. The MKIII even picked up the heat rising from one of those little fire chimney things on a guys back porch from almost two blocks away. The ATN didn&#039;t see it. I haven&#039;t shot it yet but imagine it will perform as expected. I couldn&#039;t be happier!!

  • 5
    You&#039;d Be crazy to spend your $ on anything else!

    Posted by Tim Grinage on Feb 15th 2016

    After reviewing and reading everything about this weapon sight for a month, I purchased one. Received the sight in one day, mounted it up and spent just 10 mins sighting it in. Then I got familiar with the operating of the sight. It&#039;s so simple to become adjusted to the menu&#039;s. Took it out and harvested 5 pigs unsuppressed. I wanted to see how it would be to have to look for them when they knew they were being hunted. It&#039;s was flawless.
    Thank You to Tyler for taking the time to discuss all my options, Ultimate Nightvision is a first class operation. Now I have to finish out my wait for the White Phosphorus googles to get here.

  • 5
    Perfect Cable!

    Posted by Josh on Feb 12th 2016

    This cable is very well made. When it hooks into your thermal you can bet your ass it&#039;s not coming out under the harshest of conditions. I just plug it in and know that it&#039;s going to give me that perfect video everytime! Awesome job, ultimatenightvision!

  • 5
    Hog Hunting

    Posted by Carl Ondrusek on Feb 8th 2016

    This thermal is great!! Clear bright picture that you can adjust to your liking. Lots of options on this scope. We won the hog tournament with this scopes help! Tyler is a great guy and very helpful.

  • 5
    IR Hunter MKIII 35mm 2.5X - 20X Thermal Rangefindi

    Posted by StevenD on Jan 4th 2016

    Great service. Tyler was very helpful and good to work with. The IR MK3 is everything and more than I was expecting.