Athlon Optics 8.5x42 Cronus Binocular

Athlon Optics 8.5x42 Cronus Binocular

Athlon Optics 8.5x42 Cronus Binocular

B&H # AT85X42CB MFR # 111002
More on the Way
Expected availability: 7-10 business days

Product Highlights

  • Extra-Low Dispersion Glass Objectives
  • E2ES Field-Flattener Lens System
  • Compact BAK4 Roof Prisms
  • Dielectric Coated and Phase Corrected
  • Broadband Fully Multi-Coated Optics
  • Protective XPL Exterior Lens Coatings
  • Wide 64° Apparent Angle of View
  • Argon-Filled, Waterproof and Fogproof
  • Lightweight and Strong Magnesium Chassis
  • Tripod Mountable with Optional Adapter
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Athlon Optics 111002 overview

  • 1Description

Designed as part of their flagship series, the Athlon Optics 8.5x42 Cronus Binocular forgoes convention and boosts the magnification slightly to bring subjects in closer while maintaining a wide field of view and exit pupil, which tend to narrow with higher power optics and limit their low-light use. This Cronus is engineered to deliver the outstanding performance and precision required by birders, hunters, and discerning outdoor enthusiasts who need to resolve small details at distance.

To deliver peak performance, it is outfitted with extra-low dispersion (ED) glass, broadband anti-reflection fully multi-coated optics, dielectric coated and phase-corrected BAK4 roof prisms, and protective exterior lens coatings that work together to maximize light transmission through the entire light path without distortion or color fringing. Added to this impressive list of optical features is a field-flattener lens system that corrects spherical distortion at the edges of the field of view to maintain tack-sharp views wherever the user looks. The results are bright, sharp, and clear high-contrast views with accurate color fidelity and crisp resolution across the entire visual spectrum, even in challenging conditions such as at dawn and dusk. To further improve the observational experience, the Cronus is designed with an exceptional eye relief and wide exit pupil, as well as a spacious 65° apparent angle of view. This minimizes distracting hand shake common with powerful optics and presents a spacious field of view.

Athlon built the Cronus to make it easy and comfortable to hold and allow it to withstand the harshest elements. The optical tubes are argon-filled and O-ring sealed to be waterproof and resistant to internal fogging if the weather turns or they take an accidental spill in a stream or puddle. Protecting the optical components is a magnesium alloy chassis that is strong and durable, yet extremely lightweight. Rubber armoring with textured palm pads provides a sure and secure grip. Athlon includes objective lens caps and a one-piece ocular rainguard to protect the exterior lens surfaces. To keep the caps and rainguard safe when the binocular is in use, they are tethered to the body and strap, respectively. For those who experience fatigue when holding large optics for long periods, the Argos can be tripod mounted using an optional adapter for easy hands-free use.

Optical Performance
  • Atypical 8.5x power provides slightly more magnification than a standard 8x without narrowing the field of view and exit pupil that happens with higher power optics
  • Large 42mm objective lenses improve light-gathering ability for enhanced low-light performance such as at dawn and dusk or when peering into dense brush
  • Roof prism light path ensures the optical tubes remain slim for easier handling without affecting performance
  • Field-flattener lens system reduces spherical aberrations for crisp edge-to-edge distortion-free views
  • Extra-low dispersion (ED) glass lens elements reduce chromatic and spherical aberrations for increased contrast and improved color rendition and sharpness without distortion across the entire field of view
  • BAK4 prism glass delivers a round exit pupil and a crisp and clear image with limited edge distortion
  • Phase-correcting prism coatings eliminate internal interference to improve color and contrast
  • Dielectric Enhanced Spectral Prism (ESP) coatings boost surface reflectivity to greater than 99% for maximum light transmission through the prism with minimal loss and diffraction
  • Broadband anti-reflection fully multi-coated optics maximize light transmission and improve contrast and color fidelity across the entire visible spectrum
  • Proprietary XPL exterior lens coatings resist scratches and abrasions while allowing oil, dirt, and sap to be cleaned off without leaving smudges or residue
  • Wide 65° apparent angle of view presents an immersive and panoramic observational experience
  • Spacious 399-foot field of view at 1000 yards
Use and Handling
  • Closed-bridge configuration provides a strong and stable platform for the internal focusing mechanism
  • Large slip-resistant center focusing wheel is easy to manipulate in cold and wet weather, even while wearing gloves
  • Locking right-eye dioptric correction allows user to set the compensation for optical prescription to produce sharper views and lock it in place to avoid accidental adjustment
  • Broad 56-73mm interpupillary distance adjustment range enables easy use by a wide variety of users
  • Twist-up click-stop eyecups for easy use with or without eyewear
  • Tripod mountable with an optional adapter for hands-free use to eliminate vibrations and arm fatigue
  • Extra long 22mm eye relief allows for easier viewing with reduced eye strain during extended use
  • 4.9mm exit pupil will cover most pupils as they open and fully dilate in low light to keep the whole scene in view without vignetting
Construction Details
  • Lightweight and durable magnesium alloy chassis material
  • Protective rubber armor with textured palm pads provides a solid and secure slip-resistant grip
  • Argon-filled and O-ring sealed to be waterproof and resistant to internal fogging when moving through extreme changes in temperature and environmental conditions
  • Tethered objective lens caps and one-piece ocular rainguard protect the lens surface without the fear of losing them when not in use
UPC: 813869020016
In the Box
Athlon Optics 8.5x42 Cronus Binocular
  • Lens Cloth
  • Neck Strap
  • Carrying Case
  • 1-Piece Ocular Rainguard
  • 2 x Tethered Objective Lens Caps
  • Limited Lifetime Warranty
  • Table of Contents
    • 1Description

    Athlon Optics 111002 specs

    Prism Type Roof
    Magnification 8.5  x
    Objective Lens Diameter 42 mm
    Angle of View 7.6° (Actual)
    Field of View 399.0' @ 1000 yd / 132.5 m @ 1000 m
    Minimum Focus Distance 6.6' / 2 m
    Exit Pupil Diameter 4.9 mm
    Eye Relief 22.0 mm
    Interpupillary Adjustment 56.0 to 73.0 mm / 2.2 to 2.9"
    Focus Type Center
    Tripod Mount Yes (Adapter Optional)
    Dimensions 6.3 x 5.1" / 16.0 x 13.0 cm
    Weight 33.0 oz / 935.6 g

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