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Explore Scientific AR102 Air-Spaced Doublet Achromat Refractor

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Product Description

AR102 f/6.5 Air-Spaced Doublet AR Series™ Achromat Refractor

The latest addition to the Air-Spaced Doublet AR Series is the very portable, grab-and-go 102mm!
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 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 two-speed focuser, a 99% Reflective 2-inch Diagonal Mirror, 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 the Explore STAR Transferrable Extended Life of the Product Warranty.The front objective can be custom focused to provide a sharp image every time.



  • 102mm models are f/6.5.
  • The tube assembly is constructed from aluminum and stainless steel and painted gloss white.
  • Classic Air-Spaced Doublet achromat optics made with Crown & Flint glass


  • Research-grade, diffraction limited optics.
  • Enhanced Multi-Layer Coatings (EMD) are deposited on optical elements to boost contrast and eliminate light scatter.
  • While refractors seldom require additional collimation after initial factory adjustment, the lens cell design allows for consumer collimation. Sending off to the factory is an option, but is not required.


  • Come with a heavy-duty 2" Crayford-style two-speed focuser.
  • The heavy-duty 2" diagonal has 99% dielectric coatings for high contrast, bright images. A 1.25" compression ring adapter is included.
  • Includes an 8x50 straight-thru finderscope with a wide 6° field of view. The front objective is focusable.
  • To attach your Explore Scientific Air-Spaced Doublet telescope to a variety of mounts, we have included an extra strong extruded aluminum Cradle Ring Assembly and Universal Adjustable Mounting Plate. The "Vixen-style" plate fits mounts made by Explore, Meade, Celestron, Vixen & others.
  • All Explore Scientific products come with a STAR Extended-Life-of-the-Product Warranty. Upon registration, this product will be under warranty for as long as it is manufactured, plus five years.

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