Explore Scientific 127mm f/6.5 Achromatic Refractor with Accessories

  • Sale
  • Regular price $619.99
  • Explore Scientific 127mm f/6.5 Achromatic Refractor with Accessories

    • Sale
    • Regular price $619.99
    • ITEM #



    • Aperture: 127mm (5")
    • Focal Ratio: f/6.5
    • Focal Length: 863mm
    • Excellent value visual astronomy instrument

    Explore Scientific 127mm f/6.5 Achromatic Refractor with Accessories

    The classic air-spaced, crown-and-flint, doublet achromatic refractor is reborn with the aim to produce superior-class optical figure in a short (f/6.5) focal length design with Explore Scientific Air-Spaced Doublet AR Series. These optics are an extreme value, produce stunning images of deep sky objects, double stars, planets, and the moon that are a small fraction of the price of comparable aperture apochromat refractors. Finally one can own a diffraction-limited high quality refractor for a relatively modest investment.  

    Designed to handle the rigors of public star parties and educational outreach, the Explore Scientific AR Series has standard hardware which includes a precision 10:1 two-speed focuser, a 2-inch diagonal, and an 8x50 finder scope. You can be confident that the quality and construction of these telescopes will allow heavy use for many years and are backed with a Lifetime Warranty.

    It's All About the Optics

    The optics in their collimatable lens cell are fully multi-coated to eliminate light scatter and maintain image contrast. We precision collimate every Explore Scientific telescope at our factory to give optimum performance. Although you may never need to adjust optical alignment, the AR Series allows for collimating the lens set should the telescope ever require it.

    Contrast is further enhanced with multiple baffles that mask and deflect unwanted stray light.

    Deluxe 10:1 Two-Speed Focuser

    The Explore Scientific Air-Spaced Doublet AR Series telescopes include a precision 2-inch ten-to-one, two-speed as standard equipment. The eyepiece holder uses a compression ring to prevent the eyepiece or camera barrel from scoring.

    On those pristine nights of steady seeing, Saturn's Rings can forever affect the hearts and minds of almost anyone who lays eyes on them. It's nights like these that astronomers like to set up their refractors and push the magnification to the limits, not only to see the magnificence of the planet at greater scale but to really test the optical and mechanical quality of the telescope.

    Many telescopes are only supplied with a standard single-speed focuser, you will find that a tiny nudge will throw out focus and turn your night into one of frustration. So we included as standard equipment, on all Explore Scientific AR Series, a ten-to-one, two-speed Crayford-style precision focuser with tension adjustment and lock to obtain and hold perfect focus. We think you'll agree that such precision is worth it.

    Universal Mounting Plate

    The Universal Adjustable Mounting Plate of the AR 127 fits on many popular equatorial and Altaz mounts, including mounts supplied by Explore Scientific, Vixen, and Meade LXD55/75.

    Instead of using a cast metal part, Explore Scientific's Universal Mounting Plate is made from extruded aluminum for added strength, it is after all what secures your telescope to the mount. We also include adjustment screws and locking bolts to allow adjustments to position the angle of the telescope when it is placed on its mount, an important feature when using an equatorial mount.

    2" 99% Reflectivity Diagonal Mirror

    The Two Inch Dielectric Diagonal includes a 1.25" eyepiece holder adapter. The purpose of a diagonal is to securely hold your eyepiece and to give you a comfortable viewing angle.

    Provided as standard equipment, Explore Scientific's Two Inch Diagonal incorporates a light-weight, one-piece diagonal body that securely cradles the precision polished diagonal flat mirror, insuring precision alignment.

    8x50 Finder Scope

    The Explore Scientific 8x50 Finder Scope provides a true field of view of 6 degrees. Its coated optics provide a bright high-resolution image so that many faint stars and nebulosity can be detected for precise aiming.

    The front objective can be custom focused to provide a sharp image every time.

    OPT Product Number: ES-DAR127065-01

    Additional Information

    Aperture127 mm (5")
    Case IncludedNo
    Dew Shield IncludedYes
    Diagonal Included 2" Star Diagonal
    Exterior ColorGloss White
    Finder Included8 x 50 Optical Finder
    Focal Ratiof/6.5
    Limiting Stellar Magnitude13
    ManufacturerExplore Scientific
    Mount Type OTA Only
    Optical CoatingsExplore EMD
    Optical Design Achromatic
    OTA Length863mm
    OTA Mount TypeDual Rings
    OTA Outer Diameter130mm
    Telescope SeriesExplore Double Achro
    Tripod Type Included Sold Separately
    WarrantyLifetime Warranty
    • ES 127mm Achromatic Refractor OTA
    • 8x50 Finder Scope
    • 2" Diagonal
    • Universal Adjustable Mounting Plate
    • 2" Dual Speed Focuser

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    Questions & Answers

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    • I am looking at this telescope.  What would be an appropriate alt-az (non-computerized) mount for this scope?

      Given that the optical tube weighs in at 15 pounds, you will want a mount that can handle at least 20 lbs. One such mount is the Stellarvue M2 with the Vixen Saddle.

    • I am looking at this telescope.  What would be an appropriate alt-az (non-computerized) mount for this scope?

      Given that the telescope weights 23 lbs, getting something that would be able to support about 30 pounds or more would be a great choice. An example of this would be the Stellarvue M150 Alt-Az mount which can support 45 lbs.

    • Does this telescope outfit include a dedicated carry case? One of the reviewers indicated that a case was included.

      The Explore Scientific 127mm f/6.5 Achromatic Refractor Telescope with Accessories does not include a carrying case.

    • Can you tell me how long the dovetail is?

      The dovetail is approximately 8" long.

    • Is this telescope good for terrestrial "daytime viewing"?

      Good afternoon and thanks for asking. This would be a good daytime scope. It would require a very smooth mount to operate it at this focal length but it will provide great views.

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