Explore Scientific ED 127mm f/7.5 Carbon FCD-100 Hex-Foc Apochromatic Triplet Refractor Telescope

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Explore Scientific

Explore Scientific ED 127mm f/7.5 Carbon - Highly corrected 127mm air-spaced triplet apochromat (with three lenses) and carbon fibre tube and a 2.5" high-precision HEXAFOC focuser. NEW: Now with hybrid viewfinder shoe to accept different viewfinder holders.    

  • Three lens apochromat with two air spaces
  • Aperture 127mm; focal length 952mm; f/7.5
  • HOYA FCD-100 glass for maximum colour fidelity
  • Weight:5.2kg, lightweight due to carbon fibre tube
  • High end 2,5" Hexafoc 10:1 DeLuxe Focuser
  • 2" Star Diagonal 99% included
  • Extension tubes for focuser (2pcs)
  • Handle features mounting place for cameras
  • 44mm universal dovetail with stainless steel protection included (Fits Super/Great Polaris, EQ5, LXD75, EXOS-II)
  • Dewshield slides onto tube for easy transport ; Hybrid viewfinder shoe to accept different viewfinder holders

Apochromats are the ultimate choice in small to medium sized telescopes: the combination of compactness, transportability, very high image contrast and sharpness together with excellent astrophotographic performance cannot be bested. The advances in glass manufacturing during the last few years have made true apochromats available to more astronomy enthusiasts than ever before. The new Explore Scientific FCD-100 CF Hex represents another major improvement in this field - the overall correction (colour and spherical) is setting new standards in this price class. The optical design shows a polystrehl value of 0.97 indicating a level of correction that is absolutely top of the line.

This excellent apochromat is a very versatile telescope: its reasonably fast f-ratio makes for short exposure times when imaging deep sky objects, but it is still of a significant focal length, making higher power planetary and lunar observation comfortable without having to use really high magnification eyepieces. The high contrast and sharpness of the image provide breathtaking views of large objects like the North America nebula or the Andromeda galaxy, as well as tack sharp planetary images. The telescope is lightweight and compact - the dew shield slides down the tube to minimize size for transportation. Revolutionary glass and precision manufacturing come together to deliver a telescope that offers observing and imaging at the highest level. The Carbon Fibre construction allows this telescope to be used on lower capacity mounts, increasing convenience and portability. Although there are smaller instruments available, the combination of aperture and optical excellence at such a low weight and compact tube makes this an excellent travel scope. The well-designed 2.5" HEXAFOC focuser with 10:1 reduction is perfect for both visual and astrophotographic use - the large inner diameter of 65mm prevents vignetting by the focuser when the telescope is used for astrophotography with large sensors (full frame and above).

We offer the very popular EXPLORE SCIENTIFIC Triplet ED APO Refractors in 3 different product lines:

Essential Line: 
HOYA FCD-1 Glass lens, AL-Tube, 2.0" Rack & Pinion Focuser with 1:10, 2.0" Star Diagonal 99% Reflectivity (see Part No. 0112084(AL), 0112106(AL), 0112132(AL)), 0112155(CF + 3"FT)). 

Professional Line: 
HOYA FCD-100 Glass lens, AL/CF-Tube, 2.5" HEXAFOC Focuser with 1:10, 2.0" Star Diagonal 99% Reflectivity (see Part No. 0112086(AL), 0112108(AL), 0112109(CF), 0112134(AL), 0112135(CF))

High-End Line: 
OHARA FPL-53 Glass lens, Carbon(CF) Tube, 3.0" Feather-Touch Focuser with 1:10, 2.0" Star Diagonal 99% Reflectivity (see Part No. 0112165(CF))


  • Aperture: 127mm
  • Focal Length: 952mm
  • Focal ratio: f/7.5
  • Design: Apochromat with three lenses, two air spaces and FCD-100 glass
  • Weight: 5.2kg, lightweight due to carbon fibre tube
  • Backfocus: 150mm above 2" adaptor
  • Hybrid viewfinder shoe to accept different viewfinder holders


  • Optical tube with retractable dew-shield
  • 2.5" HEX focuser with 1:10 gear reduction  
  • 2" Star Diagonal 99% reflectivity
  • Tube rings with dovetail plate and handle 
  • Extension tubes for focuser (2pcs)
  • Dust caps for front-lens and focuser
  • Hybrid viewfinder shoe  

Technical Data

Field of application
  • Deep Sky Observation
  • Deep Sky Photography
  • Land observation
  • Land object photography
  • Lunar observation
  • Lunar photography
  • Planetary observation
  • Planetary photography
Focus Group
  • Advanced Amateurs
  • Visual enthusiasts
  • Specialists and Research
Product Family Refractor telescope
Optical design Apochomatic Refractor
Maximum recommended magnification 250
ED glass
Mirror/Lens diam. 127 mm
Focal length 952 mm
Aperture ratio 7.5
Type of coating Enhanced Multilayer Desposition (EMD)
Material OTA Carbon fiber
Eyepiece Barrel Diameter 50.8 mm
Colour Carbon Fiber
Mount Type Optics without Mount
Extended warranty 10 years
Net weight (without access.) 5200 g
Total length 79 cm
Total width 17.6 cm
Total height 17.6 cm
Tube diameter 145 mm
Tube length 790 mm
What's in the Box
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