How to Use a Thermal Scope During the Day: Settings...

One of the most common questions we hear from hunters and shooters in 2026 is this: can you hunt with a thermal scope during the day? The short answer is yes, and the ATN ThOR 6 325 is one of the best tools available to prove it. But getting the most out of daytime thermal hunting requires more than just powering on the scope. You need to understand how thermal imaging behaves in daylight, how to configure the right settings, and how to zero your optic properly for consistent performance around the clock.

This guide covers everything you need to know about running the ATN ThOR 6 325 during daylight hours, including a full settings walkthrough, zeroing procedure, and real-world tips drawn directly from the scope's capabilities.

Understanding Daytime Thermal Imaging: What Changes When the Sun Comes Up

Thermal scopes detect heat, not light. That fundamental difference is what makes a daytime thermal scope so different from a traditional riflescope or even a night vision device. During the day, solar radiation heats up rocks, soil, vegetation, and man-made surfaces unevenly. This creates what thermal hunters call thermal clutter or thermal noise, where the background radiates enough heat to compete with or obscure an animal's heat signature.

That is the challenge. But it is also manageable with the right scope and the right settings.

The ATN ThOR 6 325 addresses this directly through its 6th Generation thermal engine. Featuring a 384×288 resolution sensor with an ultra-sensitive NETD rating of 15mK or less, the ThOR 6 325 can resolve temperature differences as small as 0.015 degrees Celsius. That level of sensitivity means it can pick out the thermal signature of a hog or coyote even when the surrounding brush has been warmed by midday sun.

The 12μm pixel pitch on the VoX uncooled focal plane array sensor delivers tight pixel density, which translates directly into sharper target definition at distance. For a scope with a 25mm germanium lens at F/1.0, that means a detection range of up to 2,300 meters and a field of view of 10.53 degrees horizontal by 7.91 degrees vertical, giving you a usable wide-angle perspective for scanning open terrain during the day.

ATN ThOR 6 325 Review 2026: Why This Model for Daytime Use

Before diving into the settings guide, it is worth understanding why the ATN ThOR 6 325 review 2026 landscape consistently points to this specific model for all-day hunters. The 325 designation refers to the 384×288 sensor resolution with the 25mm germanium lens, making it the most compact and wide-angle configuration in the ThOR 6 lineup.

That wide field of view is a practical advantage during daytime hunting. You are scanning more terrain per sweep, which is critical when you are looking for coyotes moving across open fields or hogs working the edges of a food plot in afternoon heat. The 2.5x to 20x magnification range with step and smooth zoom gives you the flexibility to spot at wide angle and then zoom in to confirm identity before taking a shot.

At 790 grams and measuring 410 x 85 x 66mm, the ThOR 6 325 is the lightest and most compact full-featured model in the lineup. That matters when you are carrying it in the heat of the day on a stalking setup or running it on a lighter rifle platform.

The integrated 0.49-inch 1920x1080 OLED display delivers high-contrast visuals with true blacks and bright highlights, which is particularly important during daytime use when you need the display to pop clearly even as your surroundings are bright and thermally active.

ATN ThOR 6 325 Specs Overview for Daytime Setup

Here is a quick-reference breakdown of the ATN ThOR 6 325 specs most relevant to daytime operation:

• Sensor Resolution: 384×288
• Thermal Sensitivity (NETD): 15mK or less
• Pixel Pitch: 12μm
• Lens: 25mm Germanium, F/1.0
• Magnification: 2.5x to 20x (Step and Smooth Zoom)
• Field of View: 10.53° x 7.91°
• Detection Range: 2,300 meters
• Display: 0.49-inch OLED, 1920x1080
• Refresh Rate: 50Hz
• Color Palettes: White Hot, Black Hot, Iron Red, Alarm, Green Hot, Sepia
• Battery Life: Approximately 9 hours
• IP Rating: IP67
• Weight: 790g / 1.74 lbs
• Dimensions: 410 x 85 x 66mm
• SharpIR AI Enhancement: Yes
• Hot Point Tracking: Yes
• Zeroing Freeze: Yes
• Picture-in-Picture: Yes
• Wi-Fi Hotspot: Yes
• Internal Storage: 64GB
• RAV: Yes

The 9-hour battery life is built on two 18650 rechargeable batteries, one internal and one replaceable. For a full-day hunt from pre-dawn through late afternoon, you have more than enough power on a single charge. Carrying a spare set of 18650 batteries covers you for an extended overnight setup without needing to return to camp.

Thermal Scope Setup Guide: Initial Configuration for the ATN ThOR 6 325

This thermal scope setup guide assumes you have already mounted the ThOR 6 325 in 30mm rings on your rifle and have completed the basic power-on sequence. ATN's startup time is under 7 seconds from cold boot and instant from standby, so the scope is ready when you are.

Step 1: Diopter Adjustment

Before you do anything else, get the image sharp to your eye. The ThOR 6 325 has a diopter range of -5 to +5D, which accommodates a wide range of vision. Power on the scope, point it at a uniformly warm surface or open sky, and rotate the diopter ring until the display image appears crisp. This is a personal calibration that affects how the OLED screen appears to your eye, not the actual thermal image quality. Getting this right first prevents you from chasing other settings to fix a problem that is actually just diopter misalignment.

Step 2: Manual Focus Adjustment

The ATN ThOR 6 325 uses a manual central knob focus mechanism. Unlike camera autofocus, thermal scopes require you to set the focus for the distance you intend to use. For daytime hunting, focus at your expected engagement range. Point the scope at a heat source at roughly the distance you expect to take shots, such as a heated target or a vehicle, and rotate the focus knob until the image sharpens. The 25mm lens delivers a naturally wide depth of field at the 2.5x base magnification, so you will not need to refocus as often as on higher-magnification configurations. However, when you push into the 10x and above zoom range, precise focus becomes critical.

Step 3: Select the Right Color Palette for Daytime Conditions

Color palette selection is one of the most impactful adjustments for daytime thermal use, and it is an area many hunters overlook. During the day, thermal backgrounds are more active due to solar heating. The right palette helps you cut through that clutter.

• White Hot: Best for open terrain in moderate temperatures. Warm animals appear bright white against cooler ground. Works well in morning and evening when ground temperature is still moderate.
• Black Hot: Excellent in midday heat when ground and vegetation are radiating significant thermal energy. Inverting the image so that warm objects appear dark can reduce visual fatigue and make animals stand out against a brighter background.
• Iron Red: High contrast for identifying animals in mixed terrain. The red color differentiation makes it easier to separate animals from sun-warmed rocks or bare soil at longer ranges.
• Green Hot: Reduces eye strain during extended scanning sessions, particularly useful during long afternoon setups where you are continuously glassing.
• Alarm: Highlights only the hottest objects in a high-visibility color. Useful for quick scanning but can produce false positives when rocks and asphalt have absorbed significant solar heat during midday.
• Sepia: Mild tonal rendering good for lower contrast environments or hunters who prefer a more natural visual tone.

For most daytime hunting scenarios with the ATN ThOR 6 325, start with Black Hot in high-heat conditions or White Hot in cooler morning and evening windows. Switch between them as ambient temperature changes throughout the day.

Step 4: Configure Non-Uniformity Correction (NUC)

NUC is a calibration routine that thermal detectors require to maintain image uniformity across all pixels. The ATN ThOR 6 325 offers Auto, Semi-Auto, and Manual NUC modes.

During daytime use, Auto NUC is the recommended setting. The scope will trigger its own NUC refresh as needed based on sensor temperature drift, which happens faster in warm daylight conditions. You will notice a momentary image freeze when NUC fires. This is normal. If you are in a situation where you cannot afford that freeze, such as tracking a moving target, switch to Manual NUC and trigger it yourself during a pause in the action.

In hot summer conditions, expect the Auto NUC to fire more frequently. This is the sensor maintaining accuracy, not a malfunction.

Step 5: Enable SharpIR AI Enhancement

ATN's proprietary SharpIR AI enhancement is one of the most useful tools for daytime thermal use. It works in real time, analyzing every pixel of the thermal image and applying edge-sharpening and contrast-boosting algorithms automatically. In daytime conditions where thermal backgrounds are cluttered with solar-heated surfaces, SharpIR helps you resolve the edges of an animal's heat signature from the noise around it.

The practical result is that a hog partially hidden in tall grass is easier to define as a discrete shape rather than a blob of heat merging with the sun-warmed grass around it. You see crisper outlines, faster. For target identification under challenging daytime conditions, SharpIR is a feature you want active at all times.

Step 6: Activate Hot Point Tracking

Hot Point Tracking is a daytime game-changer. It automatically identifies and highlights the hottest object in your field of view. When you are scanning across a field in late afternoon light with the ground radiating significant heat, Hot Point Tracking cuts through the noise and draws your eye to the thermal signature most likely to be an animal.

Enable this feature from the main menu and use it as your primary scanning tool. When something registers as the hottest point in your field of view, zoom in using the step zoom function or engage Picture-in-Picture to confirm identification before making a shot decision.

Step 7: Set Up Picture-in-Picture Mode

Picture-in-Picture is particularly valuable during the day when you want to zoom in for target confirmation while maintaining situational awareness of your surroundings. With PIP active, you get a zoomed window in a corner of the display while the main image stays at your current magnification.

Configure PIP through the menu and use it as your standard operating mode when you have spotted a potential target. Scan wide with your base magnification, activate PIP when something catches your attention, and use the zoomed window to confirm species and ethical shot placement before committing to the shot.

Step 8: Reticle Transparency Control

The ThOR 6 325 includes Reticle Transparency Control, which lets you dial down the opacity of the reticle to prevent it from obscuring your aiming point against a bright or cluttered thermal background. During daytime use when backgrounds can be thermally busy, a fully opaque reticle can disappear against a hot background or block your view of a partially obscured target.

Set reticle transparency to a level where you can clearly see the crosshair against any background you are likely to encounter. A moderate transparency setting typically works well across varied daytime conditions.

How to Zero a Thermal Scope: ATN ThOR 6 325 Zeroing Procedure

Understanding how to zero thermal scope optics is different from zeroing a traditional scope, and the ATN ThOR 6 325 includes specific tools that make this faster and more accurate. The scope ships with a heated target specifically designed for this process.

Pre-Zeroing Setup

Mount the ThOR 6 325 in your 30mm rings with proper torque and ensure the scope is level. Set up the included heated target or any heat-emitting target at your chosen zero distance. A 100-yard zero is standard for most rifle configurations, though you may choose a different distance based on your primary hunting application.

Power on the scope and allow it to reach operating temperature. Run a manual NUC before beginning the zero process to ensure the image is as clean and accurate as possible.

Using Zeroing Freeze

The Zeroing Freeze feature is the most important zeroing tool in the ATN ThOR 6 325 and addresses one of the biggest frustrations with thermal zeroing: the image is always moving, and by the time you look at where your shot landed, the display has already updated and the impact signature may have faded.

Here is the procedure for using Zeroing Freeze effectively:

• Fire a single round at your heated target from a stable rest.
• Immediately activate Zeroing Freeze from the menu or shortcut button. The scope pauses the display image at the moment of impact, preserving the thermal signature of your bullet strike.
• With the frozen image on screen, navigate to the zeroing menu and adjust the reticle to align with your impact point. You can move the reticle precisely over the bullet hole without rushing.
• Confirm the adjustment, release the freeze, and fire a follow-up round to verify your zero.
• Repeat if necessary until your point of aim matches your point of impact.

The ThOR 6 325 supports up to five saved weapon profiles, so if you run this scope on multiple rifles or different calibers, you can save each zero independently and switch between them without re-zeroing. This is a significant practical advantage for hunters who run the same thermal on a predator rifle during the day and a different platform at night.

Verifying Your Daytime Zero

One critical point about zeroing a thermal scope for daytime use: verify your zero under the same conditions in which you plan to hunt. Thermal imaging is not affected by light, but ambient temperature does influence how your target and surroundings appear. Run a verification shot during the time of day and in the temperature conditions that match your hunting scenarios. If you plan to hunt midday in summer heat, verify your zero in those conditions. The scope's mechanics will not change, but this process gives you confidence and confirms your settings are dialed in for real-world conditions.

Can You Hunt With a Thermal Scope During the Day: Practical Field Strategies

Getting back to the central question of can you hunt with a thermal scope during the day, the answer is a definitive yes, but success depends on adapting your strategy to daytime thermal conditions.

Morning and Evening Windows

The best daytime thermal hunting windows are the first two hours after sunrise and the last two hours before sunset. During these periods, the ground has not yet absorbed significant solar radiation, so background thermal noise is lowest. The contrast between an animal's body heat and the surrounding environment is at its maximum. The ATN ThOR 6 325's 384×288 sensor at 15mK sensitivity performs exceptionally during these windows, delivering images that rival what you see at night in terms of target clarity.

Midday Strategies in Hot Conditions

Midday hunting with a thermal scope is more challenging but still productive, especially for hog control and predator management. In high heat, switch to Black Hot palette, reduce your digital zoom to keep your field of view wide, and rely heavily on Hot Point Tracking to cut through background clutter. Focus on areas where animals are likely to be bedded in shade, such as creek bottoms, dense brush, and tree lines. Bedded animals still radiate body heat above their surroundings, and the 15mK sensitivity of the ThOR 6 325 sensor is capable of distinguishing a bedded hog under brush even when the ground around them has warmed significantly.

Using Wi-Fi for Partner Confirmation

The built-in Wi-Fi hotspot connecting to the ATN Connect 6 app lets you share your live thermal view with a hunting partner. During the day, this is useful for confirming target identification. If you are uncertain whether the thermal signature you are looking at is the target species you intend to shoot, your partner can view the same image on a tablet or smartphone from a different angle or with fresh eyes. This is also a valuable safety tool in any hunting environment.

RAV for Daytime Shot Documentation

Recoil Activated Video automatically captures 10 seconds before and after your shot. During the day, RAV gives you instant documentation of your kill shot without requiring any button presses at the moment of firing. Review the footage immediately in the internal gallery to confirm shot placement, watch animal reaction, or assess whether a follow-up shot is needed. This is particularly useful in dense brush where you cannot immediately see where an animal fell.

Daytime Thermal Scope Performance: What to Expect Across Seasons

Seasonal variation affects daytime thermal performance more than most hunters realize. Here is how to adapt your ATN ThOR 6 325 settings across the hunting calendar:

Summer and Early Fall

Highest thermal noise period. Ground temperatures can approach or exceed animal body temperatures in open terrain during peak afternoon heat. Focus on shaded environments, use Black Hot palette, keep Hot Point Tracking active, and hunt primarily in morning and late afternoon windows. The ThOR 6 325's SharpIR processing is most critical during this period for separating animal signatures from background heat.

Late Fall and Winter

Optimal daytime thermal hunting conditions. Cold ambient temperatures create maximum contrast between animal heat signatures and cold backgrounds. White Hot palette works excellently. You will be able to detect animals at or close to the full 2,300-meter detection range of the ThOR 6 325 under ideal winter conditions. Midday hunting becomes far more productive as solar heating of the ground is minimal in low sun angles.

Spring

Variable conditions. Cool mornings transition to warmer afternoons. Start with White Hot or Iron Red in the morning and transition to Black Hot as temperatures climb. Spring vegetation is cooler than summer growth, which helps maintain good contrast. This is one of the better periods for daytime hog hunting with thermal as temperatures are moderate and animals are active throughout the day.

Battery Management for Full-Day Operations

The ThOR 6 325's approximately 9-hour runtime on its dual 18650 battery system covers a full hunting day from pre-dawn through late afternoon. However, daytime use in hot ambient temperatures can affect battery performance. Here are practical tips for managing power in the field:

• Use the standby sleep mode during inactive periods. The ATN ThOR 6 325 wakes from standby instantly, so there is no penalty for putting it to sleep during long waits between scanning sessions.
• Carry at least one additional set of 18650 batteries for hunts exceeding 8 hours. The replaceable battery design means a swap takes seconds.
• The USB Type-C external power supply support allows you to run the scope off a USB power bank if needed, extending your runtime indefinitely for fixed-position surveillance or all-day stand setups.
• Wi-Fi streaming and video recording increase battery consumption. If you are on an extended hunt and battery conservation is a concern, limit continuous Wi-Fi streaming and rely on RAV rather than continuous recording.

Connecting to the ATN Connect 6 App

The ATN Connect 6 app for iOS and Android connects to the ThOR 6 325 via its built-in Wi-Fi hotspot. Setup is straightforward: enable Wi-Fi on the scope from the menu, open the app on your device, and connect directly. No internet connection is required.

From the app, you can view a live feed from your scope's display, which is useful for daytime hunting when you want to scan without shouldering the rifle. Set up the rifle on a rest, connect the app to a phone or tablet, and scan from behind cover without exposing yourself. This keeps you concealed and reduces the chance of spooking game during daytime setups when visibility works both ways.

Common Daytime Thermal Scope Mistakes to Avoid

Based on the ATN ThOR 6 325's feature set and how thermal imaging behaves during the day, here are the most common errors to avoid in your daytime thermal scope setup:

• Skipping NUC before a critical session: Always run a manual NUC when you first power up in warm conditions to ensure the sensor is properly calibrated.
• Using the wrong color palette: Hunting midday in summer with White Hot causes animals to blend into a hot background. Match your palette to conditions.
• Over-magnifying too early: Scanning at high zoom reduces your field of view and makes it easy to miss movement. Start wide, use Hot Point Tracking, then zoom in to confirm.
• Ignoring diopter adjustment: A blurry display is not always a focus problem. Check your diopter setting before adjusting the objective focus.
• Not verifying zero under daytime conditions: Zero your scope at the time of day and in the temperature conditions matching your planned hunts.
• Forgetting to run SharpIR: This feature is active by default but worth confirming in the menu. It makes a measurable difference in cluttered daytime thermal backgrounds.

Final Assessment: The ATN ThOR 6 325 as an All-Day Thermal Hunting Tool in 2026

The question of can you hunt with a thermal scope during the day is answered comprehensively by the ATN ThOR 6 325's hardware and feature set. The combination of a 384×288 sensor with 15mK NETD sensitivity, SharpIR AI enhancement, Hot Point Tracking, six color palettes, Zeroing Freeze, and a 9-hour battery life creates a scope that does not make compromises based on time of day. It performs in total darkness, through fog, and in the full heat of a summer afternoon.

What separates this scope from less capable thermal options is its intelligent processing. Raw sensor performance gets you most of the way there, but SharpIR's real-time AI enhancement and Hot Point Tracking are what make the ThOR 6 325 genuinely productive in the challenging midday thermal environment that defeats less sophisticated sensors.

For predator hunters, hog control operators, and property managers running all-day operations, the ATN ThOR 6 325 in 2026 is the most capable and practically configured thermal scope in its class. Set it up correctly following this guide, zero it with the Zeroing Freeze feature, match your color palette to your conditions, and you will find that daylight is no longer a limitation. It is just another operating environment where your thermal advantage continues to hold.