Copy of Used Explore Scientific AR102 f/6.5 Air-Spaced Doublet Achromat Refractor Telescope - UT-11263-Sold

ITEM #
UT-11263
  • Sale
  • $150.00
  • Regular price $419.00
  • Copy of Used Explore Scientific AR102 f/6.5 Air-Spaced Doublet Achromat Refractor Telescope - UT-11263-Sold

    • Sale
    • $150.00
    • Regular price $419.00
    • ITEM #
      UT-11263

    0
    Already have gear? Trade it in for cash or new equipment.
    • This is a used scope in good condition**
    • Aperture: 102mm (4")
    • Focal Ratio: f/6.5
    • Focal Length: 663mm
    • Package includes a precision two-speed focuser, a 99% Reflective 2-inch Diagonal Mirror.

    Copy of Used Explore Scientific AR102 f/6.5 Air-Spaced Doublet Achromat Refractor Telescope - UT-11263-Sold

    UT-11263: Like its two larger brothers, the AR127, and the AR152, these are classic air-spaced, crown-and-flint, doublet achromatic refractors with superior-class optical figure, in a short (f/6.5) focal length design. 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 apochromatic 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 two-speed focuser, a 99% Reflective 2-inch Diagonal Mirror, dew shield, 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 by the Explore Scientific 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 Two-Speed Focuser...
    The Explore Scientific Air-Spaced Doublet AR Series telescopes include a precision 2-inch two-speed as standard equipment.

    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 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 102 fits on many popular equatorial and Altaz mounts, including mounts supplied by Explore Scientific, Celestron, Vixen, and others. 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.

    Viewing Comfort and the Preservation of Precious Light...
    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 Dielectric Diagonal incorporates a light-weight, one-piece diagonal body that securely cradles the polished diagonal flat mirror, insuring precision alignment. Ultra-high reflective coatings (99% reflective) composed of multiple thin layers of dielectric material delivers maximum light output.

    You can thread standard 48mm filters into the barrel. 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 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.

      Additional Information

      Aperture102 MM (4")
      Focal Length663mm
      Focal Ratiof/6.5
      ManufacturerExplore Scientific
      Optical DesignAchromatic Refractor
      WarrantySold As Is
    • Explore Scientific AR102 f/6.5 Air-Spaced Doublet Achromat Refractor Telescope
    • Cradle Rings with Handle and Universal Saddle Plate
    • Two-Speed Focuser 2.0" I.D.
    • Dewshield
    • Dielectric-Coated 99% Reflective 2.0" Mirror Diagonal
    • ** This scope was used as a demo, a loaner and for outreach. It is a little rough. The tube is a little dinged up. One tube ring is missing a lock nut (see photo). Holes from the finder bracket are exposed (see photo). Optically the lens is in good shape. **

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    Questions & Answers

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    • Can the finder be converted to a RACI?  Is there an illuminated reticle eyepiece available for finder?

      These finders cannot be converted to right angle correct image so you will need a finder that is built already as a right angle illuminated finder. One such finder is the Antares 7x50 right angle illuminated finder. This finder fits into the finder brack

    • Can I mount this telescope on an ordinary photography tripod?

      The Explore Scientific AR102 f/6.5 Air-Spaced Doublet Achromat Refractor Telescope can be attached a phot tripod using the an adapter seen here: http://www.optcorp.com/opt-dovetail-mount-adapter-dm.html

    • Can I mount a celestron RACI finderscope to this telescope using the existing brackets? Thanks.

      Probably not. Celestron and ES use differently shaped quick release connections, and neither manufacturer supplies info about ring inner diameter or finderscope outer diameter, so it is a toss-up whether or not the finders are compatible with the other c

    • Does this package include a case or is there a case sold separately that will fit this scope?

      Unfortunately, there is no case made by Explore Scientific for this telescope at the moment.