Athlon Optics Cronus ATS 50-400x300
Athlon Optics Cronus ATS 50-400x300 Thermal Scope User Manual
Model: Cronus ATS 50-400x300 (210131)
Introduction
The Athlon Optics Cronus ATS 50-400x300 is a high-performance thermal rifle scope designed for enhanced detection and observation in various conditions. This manual provides essential information for the proper setup, operation, and maintenance of your device to ensure optimal performance and longevity.

Image: The Athlon Optics Cronus ATS 50-400x300 thermal scope, showcasing its design and controls.
What's Included
Verify that all components are present in the packaging before proceeding with setup.
- Cronus ATS 50-400 Thermal Scope
- Carrying Case
- Rubber Eyepiece
- Lens Cap
- Two 30mm Scope Rings
- Plug Adapters
- Charger & Two External Batteries
- USB Type-C Cable

Image: All items included in the Cronus ATS 50-400x300 thermal scope package.
Setup Instructions
1. Mounting the Scope
The Cronus ATS 50-400x300 is designed for use with a Picatinny Mount. Use the provided 30mm scope rings to securely attach the thermal scope to your rifle's Picatinny rail. Ensure proper eye relief and alignment for comfortable and effective use.
2. Battery Installation and Charging
The device operates on external batteries. Insert the charged batteries into the designated compartment. Use the provided charger and USB Type-C cable to charge the batteries. A full charge provides over 10 hours of operational use. The USB-C connection also allows for powering the optic with an external battery pack if needed.

Image: Illustration of the thermal scope's battery compartments, highlighting internal and external battery options.
3. Initial Power On
Press and hold the power button until the OLED display activates. The high-resolution OLED display provides a sharp, high-contrast view with vivid color.
Operating the Thermal Scope
Display and Color Palettes
The Cronus ATS features a high-resolution OLED display. You can customize the display to your preferences using one of the 6 available color palettes. Brightness and contrast can be adjusted for each color palette to suit your environment and optimize target detection.
Video: Demonstration of the 6 color palettes available on the Athlon Optics Cronus ATS thermal scope.
Reticle Selection
The scope offers a variety of digital reticle types, including 5 MOA reticles and 5 MIL reticles. Select the reticle that best suits your shooting style and environmental conditions.

Image: A visual guide to the different MOA and MIL reticle patterns available in the Cronus ATS thermal scope.
Thermal Sensor Performance
Equipped with 12 µm pixel pitch thermal sensors and low NETD ratings, the Cronus ATS provides cleaner and sharper images. This technology allows for the differentiation of smaller temperature fluctuations, resulting in increased contrast and improved detection capabilities.

Image: Comparison demonstrating the enhanced image clarity provided by lower NETD thermal sensors.
WiFi Connectivity and App Integration
The Athlon Thermal app, available for Apple and Android devices, allows users to connect to the scope via WiFi. This feature enables recording of video and capturing images directly from your device, preserving your hunting moments.

Image: Visual representation of the WiFi connection and OLED display features integrated with the Athlon Thermal app.
Care and Maintenance
- Cleaning Lenses: Use a soft, lint-free cloth specifically designed for optical lenses. Gently wipe away dust and debris. For stubborn smudges, use a small amount of lens cleaning solution. Avoid abrasive materials that can scratch the lens coatings.
- Body Cleaning: Wipe the exterior of the scope with a damp cloth. Do not use harsh chemicals or solvents.
- Storage: Store the thermal scope in its protective carrying case in a cool, dry place, away from direct sunlight and extreme temperatures. Ensure batteries are removed if storing for extended periods.
- Waterproof: The Cronus ATS is waterproof. However, always ensure all caps and covers are securely closed before exposure to moisture.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Device does not power on. | Low or depleted battery; improperly installed battery. | Ensure batteries are fully charged and correctly inserted. Try using a different set of charged batteries. |
| Image is blurry or unclear. | Improper focus adjustment; dirty lens; environmental conditions. | Adjust the focus ring. Clean the objective lens with a suitable lens cloth. Allow the device to acclimate to ambient temperature. |
| WiFi connection issues. | Incorrect app settings; out of range; interference. | Ensure the Athlon Thermal app is updated. Verify WiFi is enabled on the scope and your mobile device. Move closer to the scope. |
| Display shows artifacts or freezes. | Software glitch; extreme temperature exposure. | Restart the device. If the problem persists, contact customer support. |
Technical Specifications
| Feature | Detail |
|---|---|
| Model Name | Cronus ATS 50-400x300 (210131) |
| Thermal Sensor | 400 x 300 @12 µm |
| Display Resolution | 1440 x 1080 OLED |
| Objective Lens Diameter | 12 Millimeters |
| Magnification (Combined) | 15.1X |
| NETD | ≤25mK @ 77°F/25°C |
| Field of View (FOV) | 5.5° x 4.1° |
| Eye Relief | 1.9 inches |
| Available Reticles | 5 MOA, 5 MIL |
| Detection Range | 3280 Yards |
| Battery Life | 10+ hours |
| Connectivity | Bluetooth/WiFi |
| Mounting Type | Picatinny Mount |
| Weight | 35.3 oz (2.2 Pounds) |
| Length | 14.3 inches |
| Waterproof | Yes |

Image: A graphic displaying key product specifications for the Cronus ATS 50-400 thermal scope.
Warranty Information
The Athlon Optics Cronus ATS 50-400x300 Thermal Scope comes with a 5-year warranty. This warranty covers defects in materials and workmanship under normal use. For detailed terms and conditions, please refer to the official Athlon Optics website or contact customer support.
Customer Support
For technical assistance, warranty claims, or any questions regarding your Athlon Optics Cronus ATS 50-400x300 Thermal Scope, please contact Athlon Optics customer support. Visit the official Athlon Optics website for contact details and additional resources.
Website: www.athlonoptics.com
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