The Athlon Optics Cronus ATS Pro 35P-400 is a compact, Picatinny-mounted thermal scope that puts the same ≤25mK sensor and 35mm F1.0 lens from the full-size ATS Pro line into a package that weighs under 20 ounces and measures just 9.6 inches long. It mounts directly to any Picatinny rail — no scope rings, no tube-diameter compatibility questions — making it the fastest thermal scope in the Cronus lineup to move between rifles or set up on a new platform.

Key Features

• ≤25mK NETD Thermal Sensor – The 400 x 300 resolution sensor with 12μm pixel pitch delivers the same thermal sensitivity as the full-size ATS Pro scopes — twice the sensitivity of the ≤50mK sensors found in most competitors. You get clean target-to-background separation even in challenging conditions where temperature differentials are minimal.

• Compact Picatinny Mount Design – At 9.6" long and 19.7 oz, the 35P-400 is roughly half the weight and two-thirds the length of the tube-mounted ATS Pro scopes. The integrated Picatinny mount eliminates scope rings entirely — slide it onto the rail, lock it down, and you're ready to hunt. Moving it between rifles takes seconds.

• 35mm F1.0 Lens with 7.9° x 5.9° FOV – The fast F1.0 germanium lens maximizes infrared energy reaching the sensor. The 7.9° x 5.9° field of view provides solid scanning coverage for tracking targets across terrain.

• 3.3x–13.2x Zoom Range – Start at 3.3x base magnification for wide-area scanning, then push to 13.2x for positive identification at distance.

• 1024 x 768 OLED Display at 50Hz – The 0.39" OLED produces a crisp, high-contrast thermal image with 50Hz refresh for smooth tracking of moving targets.

• Ballistic Calculator with Auto Holdover – Input your caliber, bullet weight, and muzzle velocity, and the integrated ballistic engine calculates holdovers in real time. The holdover point displays directly on the reticle — no mental math, no dialing turrets.

• 10 Reticles + One-Shot Zero – 5 MOA and 5 MIL reticle patterns in 6 colors. One-Shot Zero for fast sight-in — fire a single round, mark the point of impact, and the scope calculates the correction automatically.

• 7 Color Palettes – White Hot, Black Hot, Red Hot, Green Hot, Iron Red, Blue Hot, and Sepia.

• Smart Video Recording + 32GB Storage – Recoil-activated recording captures before and after every shot automatically. 32GB built-in storage holds hours of footage without external cards.

• 9+ Hour Battery + WiFi – Dual-power system (1 built-in + 2 external 18500 batteries), USB-C backup, and standby mode. Stream live to the Athlon Thermal app via WiFi.

• IP67 Weatherproof, -4°F to 122°F – Fully sealed, fog-proof, shockproof. Handles high-caliber recoil and harsh conditions.

Who It's For

• Hunters who move thermal optics between multiple rifles. The Picatinny mount eliminates scope rings and tube-diameter concerns — slide it on, lock it down, and you're zeroed with One-Shot Zero in a single round. No other mounting system in the ATS Pro line is this fast to swap.

• Weight-conscious hunters and tactical operators who need thermal capability without the bulk. At 19.7 oz, the 35P-400 adds less than half the weight of a full-size thermal scope to your rifle — a meaningful difference on extended carries and stalks.

• Night predator and varmint hunters who want the same ≤25mK sensor sensitivity and ballistic calculator as the full-size Pro scopes in a more portable package. The 1,950-yard detection range covers the distances most predator and varmint engagements happen at.

• AR-platform and tactical rifle shooters who already have Picatinny rails and want a thermal scope that integrates directly without adapters or aftermarket rings.