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Explore Scientific FCD100 Series ED102 102mm f/7 Air-Spaced Aluminum Apochromatic Triplet Refractor Telescope (OTA Only), 1.14 arcsec Resolution, 714mm Focal Length, Two-Speed 2" Rack-and-Pinion Focuser, White

SKU: ESFCD1271 MFR: FCD100-10207-01
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Key Features

  • Explore deep-sky objects with this 102mm aperture Explore Scientific refractor telescope.
  • Enjoy sharp, high-contrast views thanks to the apochromatic triplet optical design.
  • Achieve precise focusing with the smooth two-speed rack-and-pinion focuser system.
  • Capture stunning astrophotography images with the stable cradle ring mount.
  • Observe planets and stars with impressive clarity at a 714mm focal length.
  • Easily attach accessories using the included 2" & 1.25" eyepiece adapters.
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Special Order?Estimated to Ship: 08/17/2025
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Reviews about this item

Review Summary

2022-01-14T07:25:39

Rated 4 out of 5

A good scope but not great

Finder is in awkward place. Optics are ok not great. Be aware optics late made in china. Fine focus is loose.. nice looking and tube Assembly is dolid

PHILIP I.

2017-04-12T18:56:03

Rated 5 out of 5

The Little Triplet From Explore Scientific Delivers The Goods.....

This Little Triplet Delivers As Promised, On The First Night Out The Seeing Was Poor At Best, Did I Mention I Live In NYC So Light Pollution Is Horrible, That Being Said The Little Frac Showed Me The Full Moon Tack Sharp Without A Filter, Alot Of Detail, Zeroed In On Jupiter To See 4 Bands On Perfect Sphere. The 4 Galilean Moons Were Like Little Diamonds On Black Velvet..... This Scope Is Worth Every Dollar..... Explore Scientific Is Bringing Awesome Instruments With High End Performance At An Affordable Price. Will Recommend This Scope To Anyone Who Wants To Be Blown Away At The True Color And The Sharpness This Little Triplet Delivers..... 5 Stars Easy.....

Adam M.

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Explore Scientific Refractor Telescope Specifications

  • Focal Length

    714mm

  • Focal Ratio

    f/7

  • Limiting Magnitude

    12.5

  • Optical Design

    Apochromatic Triplet Refractor

  • Aperture

    4"

  • Eyepiece Barrel Diameter

    2" (50.80mm), 1.25" (31.75mm) with included adapter

  • Diagonal

    90 deg.

  • Finderscope

    No

  • Tripod

    No

  • Resolution

    1.14 arcsec

  • Tube Length with Dew Shield

    30.5" (774.70mm)

  • Tube Length without Dew Shield

    23.75" (603.25mm)

  • Diameter

    119mm (4.69")

  • Dovetail

    Vixen

  • Weight

    12lbs (5.44kg)

  • UPC Code

    812257017614

About Explore Scientific Refractor Telescope

FEATURED REVIEWS

The Little Triplet From Explore Scientific Delivers The Goods.....

By Adam M.

This Little Triplet Delivers As Promised, On The First Night Out The Seeing Was Poor At Best, Did I Mention I Live In NYC So Light Pollution Is Horrible, That Being Said The Little Frac Showed Me The Full Moon Tack Sharp Without A Filter, Alot Of Detail, Zeroed In On Jupiter To See 4 Bands On Perfect Sphere. The 4 Galilean Moons Were Like Little Diamonds On Black Velvet..... This Scope Is Worth Every Dollar..... Explore Scientific Is Bringing Awesome Instruments With High End Performance At A...

View full Review

When you're ready to delve into the mysteries of the cosmos, the FCD100 Series ED102 102mm f/7 Air-Spaced Aluminum Apochromatic Triplet Refractor Telescope is your ticket to a world of celestial wonders. This high-performance telescope, designed by Explore Scientific, is equipped with advanced Hoya FCD100 optics, comparable in quality to Ohara FPL-53, ensuring superior image clarity and contrast.

This innovative telescope is designed with an air-spaced triplet optical design, which effectively minimizes chromatic aberrations. The result is stunning, high-contrast images that bring the beauty of the night sky to life. The telescope's optical surfaces are enhanced with proprietary EMD multi-layer coatings, further boosting the quality of the images it produces.

The ED102 telescope is not just about superior optics. It also features a robust 2.5" Hexagonal focuser, designed to offer rigid support and accommodate up to 10lbs of gear. This two-speed 2" rack-and-pinion focuser allows for precise adjustments, ensuring your celestial viewing is always sharp and detailed.

Compact yet powerful, this 102mm telescope is versatile enough to be mounted on a larger telescope, adding a new dimension to your astrophotography experience by separating the guiding and imaging duties. The integrated Vixen-Style Dovetail and Explore Finder Scope Base make mounting and setup a breeze.

With a 714mm focal length and a 1.14 arcsec resolution, this telescope is perfect for viewing everything from the rugged lunar terrain to the serene structure of Saturn's rings, and even the brightest deep sky treasures of the Messier catalog. The ED102 Classic White f/7 Air Spaced Triplet with Hoya FCD100 optics and Integrated Dew Shield weighs just 12lbs, making it an ideal grab-and-go instrument for spontaneous stargazing sessions. Please note that the case and Finder Scope are not included.

Explore Scientific Refractor Telescope Features

  • High-performance 102mm f/7 Air-Spaced Aluminum Apochromatic Triplet Refractor Telescope for superior celestial viewing
  • Advanced Hoya FCD100 optics comparable to Ohara FPL-53 for high-quality, high-contrast images
  • Air-spaced triplet optical design and proprietary EMD multi-layer coatings to minimize chromatic aberrations
  • Robust 2.5" Hexagonal focuser that supports up to 10lbs of gear for precise adjustments
  • Integrated Vixen-Style Dovetail and Explore Finder Scope Base for easy mounting and setup
  • Compact and lightweight at 12lbs, ideal for spontaneous stargazing sessions and astrophotography

Key Features

  • Explore deep-sky objects with this 102mm aperture Explore Scientific refractor telescope.
  • Enjoy sharp, high-contrast views thanks to the apochromatic triplet optical design.
  • Achieve precise focusing with the smooth two-speed rack-and-pinion focuser system.
  • Capture stunning astrophotography images with the stable cradle ring mount.
  • Observe planets and stars with impressive clarity at a 714mm focal length.
  • Easily attach accessories using the included 2" & 1.25" eyepiece adapters.

What's in the box:

  • Explore Scientific FCD100 Series ED102 102mm f/7 Air-Spaced Aluminum Apochromatic Triplet Refractor Telescope (OTA Only)
  • 2 " ES Star Diagonal
  • 1.25 " Eyepiece Adapter
  • Cradle Ring with Dovetail Plate
  • Explore Scientific Lifetime Limited Warranty (1 Year + Lifetime with Registration)