Explore Scientific 102mm f/7 Air-Spaced Triplet ED Apochromatic Refractor $1,399.99,  Explore Scientific TED10207-00,Refracting Telescopes, Special Offer
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Explore Scientific 102mm f/7 Air-Spaced Triplet ED Apochromatic Refractor

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MSRP: $2,100.00
Sale Price: $1,399.99
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Savings $700.01


Item No. 637-00500
Manuf. No. Explore Scientific TED10207-00

Explore Scientific 102mm f/7 Air-Spaced Triplet ED Apochromatic Refractor, TED10207-00

The Explore Scientific 102mm f/7 Air-Spaced Triplet ED Apochromatic Refractor shown mounted on a Explore Scientific Mount (eyepiece and mount sold seperately). EMD (Enhanced Multilayer Deposition) Coatings eliminates light scatter and maintains image contrast. Contrast is further enhanced with multiple baffles that mask and deflect unwanted stray light. Hoya ED Glass, a Critical Element of Explore Scientific ED Apochromatic Refracting Telescopes

Explore Scientific uses ED (Extra-low Dispersion) FCD1 (Dense Fluor Crown) glass developed by Hoya Optical of Japan to enable the production of lenses that offer superior sharpness and color correction by minimizing the color dispersion (chromatic aberration, or the "false" color fringing seen around bright objects that happens when light rays pass through standard crown-and-flint doublet objectives). This glass type offers a more durable and long lasting solution to produce an optic to minimize chromatic aberration over delicate fluorite crystal objectives that are prone to fracturing and absorbing moisture. High Performance Optics Demand a High Precision Focuser All Explore Scientific ED Apochromatic Refractor telescopes include a precision Ten-to-One, Dual-Speed Focuser as standard equipment. Exploring the fine features around the Moon's Hadley Rille will put to test observing skills of any astronomer as well as precision of telescope optics. Better optical quality dictates more precise focusing.

This is especially true when observing at high magnification or when making CCD images. With a standard 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 ED Apos, 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.

Optical Alignment

We precision collimate every Explore Scientific telescope at our factory to give optimum performance. Although you may never need to adjust optical alignment, our ED Apos allow for optical centering to collimate the lens elements should the telescope ever require it. One of the bonuses of ownership of a refractor is that, compared to standard reflector telescopes, they almost never require re-aligning of the optics (collimation). However, any telescope that is subjected to shock may require optical alignment.

Removing the dew shield, you can access the alignment screws, which you can adjust yourself by referring to the instructions. You can also send it to Explore Scientificıs Service Center for alignment. A standard service charge applies.

Viewing Comfort and the Preservation of Precious Light The Two Inch Dielectric Diagonal includes a 1.25" eyepiece holder adapter and dust covers to protect the mirror. 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 precision 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.

Both 2" and 1.25" eyepiece holders use compression rings instead of a simple set-screw to more securely hold your valued eyepiece (or imaging device) and to minimize scoring of eyepiece barrels. You can thread standard 48mm filters into the barrel.

We Keep You from Getting Lost in the Dark! The Explore Scientific 8x50 Erect-Image Viewfinder with Illuminated Reticle is standard equipment. Many premium small refractors don't include some basic accessories like a viewfinder. This is often done to keep prices down. Those manufacturers rationalize that its owner simply will not need a viewfinder... wrong!

While it's true that ED Apos in this aperture usually have short focal lengths, it still is a challenge to successfully aim the telescope without a viewfinder. So we decided to offer a superior class 8x50 viewfinder as standard equipment. The illuminated reticle of the 8x50 Viewfinder with its scale markings and open center not only helps you center objects precisely, but gives a reference of the exact field of view in degrees. The deep red illumination is continuously variable to provide the desired brightness. The Explore Scientific 8x50 produces a wide 6ı field of view and allows precision focus of both main objective and eyepiece illuminated reticle. A precision polished roof prism produces images that are right-side-up, left-to-right correct. In other words, things are not upside-down and backwards like most viewfinders. Our illuminated reticle is truly designed for finding objects with its open center (so you don't mask the object you are centering with cross hairs) and scale markings for 1.5 degree, 3 degree, and 4.5 degree (the edge of the field of view is the 6ı boundary).

The 55 degree apparent field, long eye-relief eyepiece produces a bright 15.5mm exit pupil and will allow you to find faint galaxies, comets, and nebulae. All optics are fully-multicoated to insure maximum contrast.

Universal Mounting Plate - The Universal Adjustable Mounting Plate of the ED 102 fits on mounts supplied by Explore Scientific, Vixen, and Meade LXD55/75. It also attaches to photo tripods with standard USA or European thread attaching knobs. You can mount the ED 102 to many popular equatorial and Altaz mounts, including a Explore Scientific Mount.


  • Optical Design: Air-Spaced Triplet ED Apochromatic Refractor with HOYAı Dense Fluor Crown, FCD1 ED Glass
  • Clear Aperture: 102mm
  • Focal Length: 714mm
  • Focal Ratio: f/7
  • Resolving Power: 1.14 arc seconds
  • Coatings: EMDı (Enhanced Multilayer Deposition) Coatings
  • Limiting Stellar Magnitude: 12.5
  • Maximum Practical Visual Power: 400x
  • Lowest Useful Visual Power: 14.5x
  • Focuser: Ten-to-One Dual-Speed Crayford-Style, w/ Adjustable Tension and Lock
  • Viewfinder: 8x50 Straight; Correct Image; Illuminated Reticle; Adjustable Objective and Eyepiece Focus; Dual-Ring, Six-Point, Bracket w/Quick Release Shoe
  • Saddle Plate: Dual Ring Style - Fits Explore Scientific Mounts; Vixen Mounts; Meade LXD55/75 Mounts
  • Tube Diameter: 119mm
  • Tube Length: 30.5 in.; 774.7mm (incl. dew shield) 23.75 in; 603.25mm (without dew shield)
  • Tube Construction: Aluminum; Stainless Steel
  • Optical Tube Assembly Weight: 9.62 lbs; 4.36 kgs.
  • Recommended Optional Accessories: Mount (Explore Scientific, etc.); 82 degree Eyepieces; 100 degree Eyepieces
  • Warranty: U.S.A. One-Year Limited Warranty, Extendable to Five Years (transferable) Upon Registration
  • Shipping Weight: 38 lbs; 17.2 kgs.
  • Shipping Carton Dimensions: 17" x 14" x 29"
  • Case Dimensions: 26.5" x 12" x 13.75"
  • Removable Dew Shield
  • Front and Rear Dust Covers
  • Cradle Rings with Handle and Universal Saddle Plate
  • 10:1 Two-Speed Focuser 2.0" I.D.
  • 8x50 Erect-Image, Illuminated Reticle Viewfinder with Six Point Adjustable Bracket
  • 2.0" 99% Reflective, Dielectric-Coated, Mirror Diagonal with 1.25" Adapter
  • Deluxe Heavy-Duty Case

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