Filters

ED APO FCD1 Series

Apochromatic (ED APO) lenses are designed to bring all the colors into focus in the same plane where as Achromatic lenses are corrected to bring two wavelengths into focus in the same plane. 

FCD-1 is manufactured by Hoya in Japan. This glass is used in the FCD-1 ED Essential and Carbon Fiber Series Apochromatic high-performance refractors.

Chromatic aberration is the phenomenon of different colors focusing at different distances from a lens. Telescope objective lenses for wide-band digital imaging in astronomy must have apochromatic correction, as the optical sensitivity of typical CCD imaging arrays can extend from the ultraviolet through the visible spectrum and into the near infrared wavelength range. Apochromatic designs require optical glasses with special dispersive properties to achieve three color crossings. Explore Scientific achieves this using costly ED (Extra-Low Dispersion) glass.

 

  • Explore Scientific ED80 Essential Series Air-Spaced Triplet Refractor - ES-ED0806-01
    Sold out
    $ 849.99

    Explore Scientific ED80 Essential Series Air-Spaced Triplet Refractor - ES-ED0806-01

    Explore Scientific

    Description The ED80 Essential Series Air-Spaced Triplet Refractor is a true apochromat that reveals celestial wonders like the desolate beauty of...

    View full details
    $ 849.99
    Sold out
  • Explore Scientific ED102 Essential Series Air-Spaced Triplet APO Refractor Telescope - ES-ED10207-01
    Save 25%
    Original Price $ 1,199.99
    Current Price $ 899.99

    Explore Scientific ED102 Essential Series Air-Spaced Triplet APO Refractor Telescope - ES-ED10207-01

    Explore Scientific

    Description The Explore Scientific ED102 Essential Series Air-Spaced Triplet APO Refractor Telescope is a true apochromat refractor that reveals o...

    View full details
    Original Price $ 1,199.99
    Current Price $ 899.99
    Save 25%
  • Explore Scientific ED127 Essential Series Air-Spaced Triplet Refractor - ES-ED127075–03
    Save 24%
    Original Price $ 1,899.99
    Current Price $ 1,449.99

    Explore Scientific ED127 Essential Series Air-Spaced Triplet Refractor - ES-ED127075–03

    Explore Scientific

    Description Great for astrophotography and critical visual observations, the Explore Scientific ED127 Essential Series Air-Spaced Triplet Refracto...

    View full details
    Original Price $ 1,899.99
    Current Price $ 1,449.99
    Save 24%
  • Explore Scientific ED152 Air-Spaced Triplet in Carbon Fiber - TED15208CF-HEXDD3
    $ 4,499.99

    Explore Scientific ED152 Air-Spaced Triplet in Carbon Fiber - TED15208CF-HEXDD3

    Explore Scientific

    Description Observing with the ED152 Air-Spaced Triplet FCD1 Series Apochromatic Refractor in Carbon Fiber with genuine HOYA FCD1 ED Glass: Seriou...

    View full details
    $ 4,499.99