Bestairriflescopes.com is reader-supported. When you buy through links on our site, we may earn an affiliate commission. Learn more

2 Best Athlon Optics Cronus Ats Pro 50 640 Thermal Scope of 2026 For Predator Hunting

by 
Henry Berry
  Sep 24, 2026 7:40 PM
Prime for Young Adults: check your eligibility on Amazon

Thermal screens completely destroy natural depth perception. A bright coyote glowing against the grass at three hundred yards often looks like an easy eighty-yard chip shot. Pulling the trigger on an eyeball guess sends rounds skipping into the dirt, turning hours of cold stand hunting into bitter frustration. High-resolution sensors reveal razor-sharp heat signatures across vast pastures, but clarity cannot tell how much bullet drop to dial. Choosing a flagship optic without distance-measuring hardware leaves open-country hunters guessing their holdovers in pitch-black conditions. Meanwhile, carrying dedicated rangefinding bulk into tight timber only weighs down a fast-handling rifle setup where shots rarely push past fifty yards.

Securing the right build means stepping into the pasture knowing exactly where that bullet will land. Sorting through the configurations comes down to your typical shooting environment and rifle setup. If wide-open beanfields demand precise holdovers, pairing a 640-core sensor with a built-in rangefinder eliminates every doubt about target distance. For wooded creek bottoms and fixed-distance bait sites, running a clean, streamlined tube keeps weight manageable while fitting standard 30mm mounts with zero hassle. Here is how each 50mm option stacks up so you can choose the exact configuration built for your nocturnal hunts.

1
Athlon Cronus ATS Pro Thermal Riflescope, 50-640 2.36x-18.9X, 640x480 Resolution, 50mm Lens, 30mm Tube, OLED Display, App Compatible (210139)
Athlon Cronus ATS Pro Thermal Riflescope, 50-640 2.36x-18.9X, 640x480 Resolution,
View on Amazon
  • ARS Mark

    ARS Mark is a ranking system developed by bestairriflescopes.com. ARS Mark has no relationship or impact from any manufacturers or sales agent websites. Learn more

    8.6
  • Brand
    Athlon Optics
Key specs2
Chassis and Mounting
Built around a standard 30mm main tube, this thermal optic fits standard rifle scope rings without requiring proprietary mounting bases.
Digital and App Features
App compatible with OLED display
Pros & cons42
Pros
  • 640x480 thermal resolution delivers clear target detail across the 2.36x to 18.9x zoom range
  • Standard 30mm tube design fits common rifle scope rings without needing custom adapters
  • Large 50mm objective lens captures substantial thermal radiation in dark conditions
  • Integrated OLED display offers high visual contrast for night predator identification
Cons
  • Omits a built-in laser rangefinder for measuring target distance in open fields
  • Battery type and operating runtime are not specified in the manufacturer listing
2
Athlon Cronus ATS Pro 50L-640 Thermal Riflescope, 2.36x-18.9X, 640x480 Resolution, 50mm Lens, LRF, 2,620-Yard Detection, OLED Display (210137)
Athlon Cronus ATS Pro 50L-640 Thermal Riflescope, 2.36x-18.9X, 640x480 Resolution,
View on Amazon
  • ARS Mark

    ARS Mark is a ranking system developed by bestairriflescopes.com. ARS Mark has no relationship or impact from any manufacturers or sales agent websites. Learn more

    7.6
  • Brand
    Athlon Optics
Key specs2
Integrated Rangefinding
The onboard laser rangefinder measures distances directly, removing guesswork across open pastures where nighttime depth perception fails.
Stated Detection Range
Up to 2,620 yards
Pros & cons42
Pros
  • Integrated laser rangefinder provides precise distance confirmation in open fields
  • Rated for thermal target detection at extended distances up to 2,620 yards
  • Detailed 640x480 thermal sensor provides crisp thermal imaging at 2.36x to 18.9x zoom
  • High-contrast OLED display assists with positive quarry identification in poor visibility
Cons
  • Integrated rangefinder adds hardware components that may increase overall optic bulk
  • Scope tube diameter is not listed and must be verified before purchasing rings

Last update on 2026-09-24 / Affiliate links / Images, Product Titles, and Product Highlights from Amazon Product Advertising API

What is the main difference between the Athlon Cronus ATS Pro 50-640 and the 50L-640?

The primary difference is the integrated laser rangefinder (LRF) and listed 2,620-yard detection capability on the 50L-640 (model 210137). Both optics share a 640x480 resolution thermal sensor, a 50mm objective lens, 2.36x-18.9X magnification, and an internal OLED display. Choosing the 50L-640 gives you immediate distance verification across wide-open pastures where night conditions disrupt your depth perception. The base 50-640 (model 210139) omits the rangefinder module but provides app compatibility, making it practical for fixed-distance hunting stands or tighter timber setups.

What target detection distance does the 50mm lens provide?

The Athlon Cronus ATS Pro 50L-640 lists a maximum detection range of up to 2,620 yards. This extended distance comes from combining the 50mm objective lens with the 640x480 core and 2.36x base magnification. For the standard 50-640 (model 210139), maximum target detection yardage is not specified in the listed data, so confirm exact detection limits directly in the manufacturer documentation before buying for open-country hunting.

Does the Athlon Cronus ATS Pro thermal scope mount in standard 30mm rings?

Yes, the Athlon Cronus ATS Pro 50-640 (model 210139) features a traditional 30mm tube body, allowing it to mount in standard 30mm rifle rings. Because of the large 50mm objective lens bell, verify ring height to ensure adequate clearance above your rifle barrel or top Picatinny rail. For the 50L-640 (model 210137), check the product packaging and mounting specifications to confirm ring height and base spacing around the rangefinder unit.

What magnification range do these Cronus 50-640 thermal scopes offer?

Both the 50-640 and 50L-640 configurations feature a 2.36x to 18.9X magnification range. The low 2.36x base magnification keeps your field of view wide enough to scan open terrain and pick up heat signatures quickly. As targets move further out, scaling up toward 18.9X allows you to identify coyotes or hogs clearly on the 640x480 OLED display before taking a shot.

Which rifle setups work best with an Athlon Cronus ATS Pro 50mm thermal optic?

These scopes fit bolt-action and semi-automatic platforms built for predator and nighttime predator management. When selecting the best gun for a thermal scope, prioritize a receiver with enough rail length to achieve proper eye relief with the optic. Confirm your rifle platform accepts 30mm rings and has enough clearance to support a 50mm objective bell without contacting the handguard or barrel.

How does app compatibility work on the Cronus ATS Pro 50-640?

The Athlon Cronus ATS Pro 50-640 (model 210139) lists mobile app compatibility, allowing you to link the thermal optic directly to a smartphone or tablet. Connecting via the app enables real-time screen sharing from the 640x480 OLED display, which helps a hunting partner spot incoming predators while you stay on the rifle. Check the manufacturer application specifications to confirm mobile operating system requirements and connection protocols before heading into the field.

4
1 ratings
Henry Berry
WRITTEN BY
Henry Berry
Hi, I'm an avid air rifle and hunting enthusiast. I love spending time outdoors and enjoying the sport of hunting. If you're looking for someone to talk to about air rifles and hunting, I'm your guy. Feel free to shoot me a message.