Explore Scientific


Explore Scientific HOYA FCD100 Series 80mm Air-Spaced Triplet Refractor Telescope

The Explore Scientific 80mm f/6 Essential FCD100 ED APO Triplet Refractor Telescope features a triplet apochromatic lens system with Hoya's exceptionally engineered and crafted FCD100 extra low-dispersion (ED) glass and Explore Scientific's proprietary anti-reflection EMD fully multi-coated optics.

This combination of glass, lenses, and coatings virtually eliminates chromatic and spherical aberrations for clear and bright high-contrast images without distortion across the entire field of view, allowing you to enjoy observing your favorite celestial objects.

Having a true diffraction-limited optical design and the perfect size for 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.


  • Hoya FCD100 extra-low dispersion (ED) glass virtually eliminates chromatic aberration for enhanced contrast and accurate color rendition across the entire visible spectrum
  • Apochromatic triplet lens configuration reduces spherical aberrations and corrects distortion across the entire field of view
  • Proprietary anti-reflection EMD enhanced multi-coatings on all optics improve light transmission to help produce bright and clear high-contrast images
  • 2-speed 2.5" diameter hexagonal focuser with 2" eyepiece/accessory holder; 10-pound (4.5kg) payload capacity to handle heavier imaging systems without flexing or bending
  • Compatible with any GoTo, alt-az, or equatorial mount with a Vixen-style saddle


Type Refractor
Lens Type Apochromat
Focal Lenght 480mm
Focal Ratio f/6
Eyepieces 99% Reflective 2" Diagonal
Weight 7.5lbs
Limiting Magnitude 12
Resolution 1.45 arcsec
Tube Length w/ Dew Shield 18.5"
Diameter 85mm
Dovetail Vixen
Mount included No