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Explore Scientific  |  SKU: FCD100-10207-02

Explore Scientific ED102 102mm f/7 FCD100 Series Air-Spaced Triplet Refractor Telescope


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Explore Scientific ED102 102mm f/7 FCD100 Series Air-Spaced Triplet Refractor Telescope



  • 102mm / 4" Aperture Refractor OTA
  • 714mm Focal Length
  • f/7 Focal Ratio
  • Apochromatic Air-Spaced Triplet Lens
  • Hoya FCD100 Anomalous ED Glass
  • Proprietary EMD Enhanced Multi-Coatings
  • Vixen-Style Dovetail Plate
  • Heavy-Duty 2.5" Hexagonal Focuser
  • 90° Dielectric Star Diagonal
  • OTA Only - Mount and Tripod Required


Reveal celestial wonders like the desolate beauty of the lunar terrain, the serene structure of Saturn’s rings or the brightest deep sky treasures of the Messier catalog with Explore Scientific’s 102mm FCD100 Apochromatic Refractor Telescope.

This is essentially the same scope as the ES-ED10207-02 but offering greater quality optics. We use Hoya FCD100 optics which is very similar in characteristics as Ohara FPL-53. Relying on technological innovation, we have successfully launched the mass production of high-performance optical glass at the apex of the FCD family. Combining it with optical glass of high refractive index allows us to achieve unprecedented advanced chromatic aberration correction. Hoya FCD100 is considered the best glass ever produced by Hoya.

Having a true diffraction-limited optical design and sized to encourage spontaneous stargazing sessions, this high-quality telescope is a perfect grab-and-go instrument for exploring the skies.

Featuring an air-spaced triplet optical design that virtually eliminates chromatic aberrations, this telescope generates brilliant high-contrast images by combining genuine HOYA FCD100 extra-low dispersion (ED) glass and proprietary EMD enhanced multi-layer desposition coatings on all optical surfaces.

This amazing little scope includes a 2.5" Hexagonal focuser with very rigid design and strong support. Up to 10 lbs of gear can be loaded onto this focuser.

Although it is a standout telescope on its own, the 102mm also is compact enough to mount on a larger telescope, which can add versatility to your astrophotography experience by separating the guiding and imaging duties.

ED102 Classic White f/7 Air Spaced Triplet with Hoya FCD100 optics and Integrated Dew Shield; 714mm focal length; 2.5" HEX Focuser with 2 extension tubes; Integrated Vixen-Style Dovetail, Explore Scientific 2N1 Hybrid Finder Scope Base installed on scope; 99% Reflective 2" Diagonal. (Case and Finder Scope NOT Included. Add the Explore Scientific 8x50 Straight Through Illuminated Viewfinder or the Explore Scientific 8x50 Illuminated Right Angle Polar Finder Scope)


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Explore Scientific ED102-FCD100 Series Air-Spaced Triplet Refractor Telescope - FCD100-10207-02 811803034389

Explore Scientific ED102 102mm f/7 FCD100 Series Air-Spaced Triplet Refractor Telescope





102 mm | 4"

Focal Length

714 mm

Focal Ratio


Field of View



1.14 arcsec resolution

12.5 limiting magnitude

HOYA FCD100 extra-low dispersion (ED) glass

EMD enhanced multi-layer coatings

Barrel Size



30.5" (774mm) Tube Length w/ Dew Shield

23.75" (603mm) Tube Length w/out Dew Shield

119mm Tube Diameter


10.9 lb | 4.94 kg
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