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// 29.9.2023 GA4 add to cart // 29.9.2023 GA4 add to cart

Athlon Cronus BTR 4.5-29x56 FFP

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Athlon Cronus BTR 4.5-29x56 FFP Details

  • Cronus BTR is the most advanced series of riflescopes in Athlon’s offer, packed with various features.
  • ED glass provides a bright, sharp image and amazing resolution, which is especially useful for long range shooting.
  • Even though it is the most expensive among Athlon’s riflescopes, it comes with many characteristics, making it a great value for money.
  • Rugged construction combined with a reticle etched on the glass makes this riflescope highly shock resistant, suitable for use on all calibers.
  • It is a true MIL/MIL tactical riflescope.


Athlon draws inspiration for the naming of their riflescopes from Greek mythology. They have many riflescopes in their offer, and each series encompasses riflescopes from a specific price class. In the Neos series, Athlon’s entry-level riflescopes are positioned, while the Cronus series comprises their top of the line riflescopes.

Some of Athlon riflescopes carry the ‘BTR’ mark. BTR stands for Bright Tactical Reticle, which basically means that the riflescope features an illuminated tactical reticle.

About the series (Cronus BTR)

Cronus is Athlon's top of the range riflescope series. The improved and redesigned ‘BTR’ series carries a high price tag but is packed with various useful features. Currently, there is one model available, the Cronus BTR 4.5-29x56. They are manufactured in Japan. Cronus BTR comes with a lifetime warranty.

It features ED glass, giving you a bright and sharp image. The first focal plane reticle changes in size with magnification and thus remains valid, allowing you to fully utilize the specially designed reticle as you increase or decrease the magnification.

The reticle is etched on the glass, making the whole construction more durable and providing greater shock resistance to recoil. The high precision erector system ensures that each power setting is on point and makes for a smoother magnification change.

The optics are fully multi-coated, reducing the reflection of light and providing a brighter image. The XPL coating applied to the external parts of the lenses repels dirt and oil from the surfaces. It also partially protects against scratches. Thanks to argon purging, Cronus BTR is waterproof and fogproof, providing protection against water and allowing you to immediately engage your target when you take your rifle from a warm to a cold place.

About the model (Cronus BTR 4.5–29x56)

Athlon Cronus BTR 4.5–29x56 features exposed multi-turn turrets with a Zero Stop function. The rifle scope comes with a big elevation range (32 mil/110 MOA) and 18 mil/64 MOA of windage adjustment. The illuminated reticle can be set to 11 brightness settings and provides great visibility in a low light environment.

It has three reticle options, all of them with a Christmas tree design. Two of them come in MIL and one in MOA.

  • FFP configuration
  • 6 illumination intensity levels with an off switch between each position
  • ED-glass enhances clarity, resolution and eliminates chromatic aberration
  • 110 MOA/32 MIL of elevation range
  • ED glass
  • 34mm tube
  • Exposed tactical turrets
  • 1 cm / 100 m (0.1 MIL) or ¼ MOA clicks
  • Zero Stop
  • Made from durable 6061 T6 Aluminium
  • XPL coating on the external parts of the lenses grants protection from dirt, oil and protects the surface from minor scratches
  • Waterproof, fogproof and shockproof
  • Interior purged with argon
  • Fully Multicoated lenses
  • Adjustable parallax from 25 yards to infinity
  • Made in Japan


The product comes with 10 years of warranty. You can read more about the warranty policy here.

Athlon Cronus BTR 4.5-29x56 FFP Specifications

Rifle scopes seriesAthlon Cronus BTR
Made inJapan
In production since2017
Warranty10 years
Variable magnification Yes
Min. magnification.5.01x
Max. magnification.32.38x
Diopter adjustment -
Lens size diameter. 63.66 mm
Minimal exit pupil.1.9 mm
Maximal exit pupil.12.4 mm
Minimal field of view.1.3m/100m
Maximal field of view.8.3m/100m
Minimal eye relief.91mm
Maximal eye relief.96mm
Twilight Factor -
Light transmittance -
Fast focus eyepiece type Yes
Type of Turret Tactical
Locking turretsNo
Number of Turret Turns MT - Multi Turn
Direction of turret rotationCCW
Elevation - mrad. 35.67mrad
Elevation - MOA.110MOA
Windage - mrad. 20.06mrad
Windage - MOA.62MOA
Elevation in each turn 10 mil
Reticle position 1. focal plane - FFP
Reticle illumination Yes
Illumination color Red
Usable at daytime No
Automatic Turn Off No
Size of Dot.0MOA
Parallax setting -
Parallax adj. Yes - side focus
Parallax adustment range 20 m - inf.
Length.363 mm
Working temperature range-
Power Supply UnitNo
Filled with Argon
Lens coatings Fully Multicoated
Tube size/diameter 34 mm
Mounting rail.No
Scope Rail StandardNo
Type of mount rail 34 mm
Mount length.160mm
Objective size diameter 66 mm
Eyepiece size diameter 30 mm
Mounting StandardN/A
Water proof Yes
Fogproof Yes
Shock proofYes
Built in Range finderNo


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