Explore Scientific ED127 f/7.5 Triplet Refracting OTA Telescope

  • ED127 Air Spaced Triplet APO
  • Carbon Fiber Body
  • Focal Ration: f/7.5
  • Focal Length: 952 mm
  • Hoya FCD100 Optics
  • Integrated Dew Shield
  • 2.5-inch HEX R&P 10:1 Focuser


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  • Regular price $2,999.99

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Explore Scientific ED127 f/7.5 Triplet Refracting OTA Telescope

The Explore Scientific Carbon Fiber ED127 f/7.5 APO Triplet with Hoya FCD100 optics and Integrated Dew Shield:

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 ED127-FCD100 Air-Spaced Triplet in lightweight Carbon Fiber!

This telescope has all the great features of the original EDT-127075-CF but includes genuine HOYA's premium FCD100 ED glass which is very similar in characteristics as OHARA's FPL-53. Relying on technological innovation, they 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 one of the premier ED glass types available.


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 coatings on all optical surfaces.


In addition, this amazing scope also includes a new 2.5-inch Hexagonal focuser with very rigid design and strong support. Up to 10-pounds of gear can be loaded onto this focuser. ED127 Carbon Fiber f/7.5 Air Spaced Triplet with HOYA FCD100 optics and Integrated Dew Shield; 952 mm focal length; 2.5-inch HEX Focuser; Cradle Ring with Handle and Vixen Style Dovetail Plate; Explore Finder Scope Base installed on scope; 99-percent Reflective 2-inch Diagonal.

(Case and Finder Scope NOT Included)


    Additional Features:
  • Limiting Magnification:13
  • Resolution: 0.9 Arcsec
  • Tube Length: 33.25-inches (849 mm)
  • Tube Length with Dew Shield: 41.75-inches (1060 mm)
  • Dovetail Style: Vixen



Aperture127 mm (5")
Dawes Limit0.91 arcseconds
Dew Shield IncludedYes
Focal Length952 mm
Focal Ratiof/7.5
Free ShippingYes
Glass TypeHoya FCD100
Highest Magnification254x
Light Gathering Power329x
Limiting Magnitude14.3
Optical DesignTriplet
Tube Diameter130mm
Tube DiameterWith Dew Shield/ 177.8 mm (7")
Tube Length33.25" (849 mm)
Tube LengthWith Dew Shield/ 41.75" (1060 mm)
Weight14 lb (10 kg)


  • Explore Scientific ED127 Carbon Fiber f/7.5 Air Spaced Triplet with Hoya FCD100 optics: Tube 130 mm diameter
  • Integrated Dew Shield: 177.8 mm diameter
  • 2.5-inch HEXagonal Rack and Pinion 10:1 two-speed Focuser
  • Cradle Ring with Handle
  • Vixen Style Dovetail Plate
  • Explore Finder Scope Base installed on scope
  • 99-percent Reflective 2-inch Diagonal
  • Weighs 12-pounds.



Customer Reviews
4.5 Based on 2 Reviews
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John O.
United States United States
Best APO refractor for the money

You can see the results by visiting my web site, www@oneilladverising.com. Robert's scope must have been damaged somehow. I'm sure Scott at Explore Scientific will fix it for him.

United States United States
Was everything I expected

I have been eyeing this scope with HOYA glass for a year and decided to pull the trigger and purchase it. With the steep discount on this scope and a fare trade-in for my RC 8" I was able to finally get this one. Working in the semiconductor field for many years I am very familiar with the excellent quality of HOYA glass to provide extremely sharp images. I only gave it four stars until I get first light on it soon. I am in the process of replacing the HEX focuser with a 3-inch rack-n-pinion FeatherTouch Focuser with stepper motor to take advantage of the F.T. focusing electronics I have with my other refractor. Nothing wrong with the HEX rack-n-pinion focuser, just wanted to upgrade it. I also replaced the dovetail mounting bar with a three inch Losmandy bar for better scope stability while imaging. Thanks to the OPT staff working with me to finally obtain it.