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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
    Explore Scientific ED80 Essential Series Air-Spaced Triplet Refractor - ES-ED0806-01
    $ 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 apochromatic telescope that reveals celestial wonders like the desola...

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    $ 849.99
  • Explore Scientific ED102 Essential Series Air-Spaced Triplet APO Refractor Telescope - ES-ED10207-01
    Explore Scientific ED102 Essential Series Air-Spaced Triplet APO Refractor Telescope - ES-ED10207-01
    $ 1,199.99

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

    Explore Scientific

    Temporarily Out of Stock, But More are On The Way! The Explore Scientific ED102 Essential Series is Available for Back-Order Purchase or Layaway...

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    $ 1,199.99
  • Explore Scientific ED127 Essential Series Air-Spaced Triplet Refractor - ES-ED127075–03
    Explore Scientific ED127 Essential Series Air-Spaced Triplet Refractor - ES-ED127075–03
    $ 1,899.99

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

    Explore Scientific

    Description Temporarily Out of Stock, But More are On The Way! Estimated Restock Date is the End of July . The Explore Scientific ED127 Essential ...

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    $ 1,899.99
  • Explore Scientific ED152 Air-Spaced Triplet in Carbon Fiber - TED15208CF-HEXDD3
    Explore Scientific ED152 Air-Spaced Triplet in Carbon Fiber - TED15208CF-HEXDD3
    Save 18%
    Original Price $ 5,499.99
    Current Price $ 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...

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    Original Price $ 5,499.99
    Current Price $ 4,499.99
    Save 18%