Explore Scientific ED APO 102mm F7 FCD-100 Alu Hex Focuser

Explore Scientific

  • €1.499,95
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Explore Scientific ED Apochromatic 102mm F/7 FCD-100 Aluminium Refractor Hexafoc Focuser

Highly corrected 102mm air-spaced triplet apochromat (with three lenses) and aluminium tube and a 2.5" high-precision HEXAFOC focuser.   

Apochromats are the ultimate choice in small to medium sized telescopes: the combination of compactness, transportability, very high image contrast and sharpness together with the possibility to make excellent astrophotos 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 Alu Hex represents another major improvement in this field - the overall correction (color 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: the fast f-ratio makes short exposure times possible. 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 created a telescope that offers observing joy on the highest level. This does not only qualify this telescope as the ideal travel scope, it is also the perfect choice for fast observations and for astrophotography. The excellent 2,5" HEXAFOC focuser with 10:1 reduction is perfect for this - the large inner diameter of 65mm prevents vignetting by the focuser when the telescope is used for astrophotography with large sensors.


  • Aperture: 102mm
  • Focal Length: 714mm
  • Focal ratio: f/7.0
  • Weigth: 4,0kg
  • Backfocus: 150mm above 2" adaptor
  • Design: Apochromat with three lenses, two air spaces and FCD-100 glass




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


Optical design Apochomatic Refractor
Magnification from 20
Max recommended magnification             200
ED glass
Objective diameter 102 mm
Focal length 714 mm
Aperture ratio 7
Angular resolution 1.35 arc seconds
Type of coating Enhanced Multilayer Desposition (EMD)
Mount Type Optics without Mount
Material OTA Aluminium
Focusing system 2.5" Hexafoc DeLuxe with 10:1
Colour white
Ext. warranty after online registration 10 Years
Net weight OTA (incl. accessories) 4 kg
Total length 56 cm
Tube diameter 106 mm
Tube length 560 mm
Eyepiece Barrel Diameter 50.8 mm



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