Skip to content
IMPORTANT: Our store is located in Canada. All orders that include products manufactured outside of Canada or USA will be subject to tariffs and duties, regardless of the order value. US customers are responsible for all applicable duties and tariffs, and those will be billed by the carrier, except for the Lacerta upgrade kit, for which we collect them at checkout.
IMPORTANT: Our store is located in Canada. All orders that include products manufactured outside of Canada or USA will be subject to tariffs and duties, regardless of the order value. US customers are responsible for all applicable duties and tariffs, and those will be billed by the carrier, except for the Lacerta upgrade kit, for which we collect them at checkout.

Language

Country

Explore Scientific ED80-FCD100 Series Air-Spaced Triplet Refractor Telescope + Field Flattener f/5 to f/7 (Bundle)

SKU ES-FCD100-0806-FF
Original price $1,299.99 - Original price $1,299.99
Original price
$1,299.99
$1,299.99 - $1,299.99
Current price $1,299.99
Price Match Policy!
  • 80mm Aperture Triplet Apochromatic Refractor
  • Features Hoya FCD100 ED Glass Element
  • Air-Spaced Triplet Objective Lens
  • Includes Field Flattener for f/5 to f/7 Systems
  • Designed for Wide-Field Astrophotography
Backordered
Availability Info
FREE Shipping in CONUS
  • Description
  • FAQ
  • Specifications
  • In the Box
  • Downloads
  • Warranty
  • ED80-FCD100 Series Air-Spaced Triplet Refractor Telescope + Field Flattener f/5 to f/7 (Bundle)

    This Explore Scientific ED80-FCD100 bundle combines an 80mm apochromatic triplet refractor with a matched field flattener, creating a complete optical system for wide-field astrophotography. The included flattener is engineered to produce sharp, pinpoint stars across the entire frame on refractors operating from f/5 to f/7. This package is built from the ground up to deliver high-contrast, color-pure images free of distracting chromatic aberration and field curvature.

    80mm FCD100 Triplet: True Apochromatic Color Correction

    At the heart of the ED80 is an 80mm air-spaced triplet objective featuring a Hoya FCD100 extra-low dispersion (ED) glass element. This three-lens design corrects for false color far more effectively than a standard doublet, virtually eliminating the purple fringing seen around bright stars and planetary limbs. The result is a true apochromatic image with sharp focus across the visual spectrum, revealing subtle color variations in nebulae and star clusters.

    Flat-Field Imaging Ready: The Included f/5-f/7 Flattener

    Refractor optics naturally produce a curved focal plane, resulting in elongated stars at the edge of an image sensor. This bundle includes the Explore Scientific Field Flattener for f/5 to f/7 refractors, which corrects this aberration. By installing the flattener, you ensure that stars remain tight and round from the center of your image to the corners, a critical requirement for producing professional-quality astrophotographs.

    ED80 Triplet vs. Doublet: A Core Imaging Choice

    For astrophotographers choosing an 80mm refractor, the primary decision is between a two-lens doublet and a three-lens triplet design. While an ED doublet offers a lighter, faster-cooling, and more affordable package, its color correction is inherently limited.

    • Triplet Advantage: The FCD100 triplet's third lens element provides a higher degree of color correction, essential for imaging with sensitive color cameras and for pushing magnification in visual use. There is no need to compromise on exposure time or processing techniques to hide chromatic aberration.
    • Doublet Trade-off: A doublet is often sufficient for casual visual use or narrowband imaging where color fringing is less of a concern. However, for one-shot-color imaging of star fields and bright nebulae, the triplet's superior color fidelity is immediately apparent.
  • What kind of astrophotography is the ED80-FCD100 bundle best for?

    This 80mm triplet refractor is ideal for wide-field deep-sky imaging. It excels at capturing large targets like the Andromeda Galaxy (M31), the North American Nebula (NGC 7000), and the Pleiades star cluster (M45) with excellent color correction and a flat field thanks to the included flattener.

    How does the included field flattener improve images with the ED80?

    The field flattener corrects for the natural field curvature of the refractor's optics. Without it, stars at the edges of your camera sensor would appear stretched or out of focus. The flattener ensures a sharp, flat focal plane across the entire imaging sensor, making your final images look professional and clean from corner to corner.

    Can I use the Explore Scientific ED80-FCD100 for visual observing?

    Absolutely. While optimized for imaging, the ED80 is a superb visual instrument. Its apochromatic optics provide high-contrast, color-free views of the Moon, planets, and bright double stars. For visual use, you would simply remove the field flattener and use a standard star diagonal and eyepieces.

    What kind of mount is required for the ED80-FCD100 imaging bundle?

    For astrophotography with the ED80-FCD100, a stable German equatorial mount with GoTo capability is highly recommended. A mount with a payload capacity of at least 20-25 lbs, such as an Explore Scientific iEXOS-100, Sky-Watcher HEQ5, or similar class mount, will provide the stability needed for sharp, long-exposure images.

    How would the ED80-FCD100 perform on the Heart Nebula (IC 1805)?

    The ED80's field of view is perfectly suited for framing large emission nebulae like the Heart Nebula (IC 1805) and the nearby Soul Nebula (IC 1848). When paired with a duo-narrowband filter, the triplet optics will produce sharp, high-contrast images revealing the intricate hydrogen-alpha structures within the nebula against a dark sky background.

    Is the 80mm aperture of the ED80-FCD100 enough for planetary viewing?

    Yes, an 80mm apochromatic refractor can provide excellent views of planets. You can expect to see Jupiter's main cloud belts and its four Galilean moons, the rings of Saturn, and polar ice caps on Mars when seeing conditions are good. Using a high-quality Barlow lens will help achieve the necessary magnification for detailed planetary observation.

  • Bundle Components FCD100-0806-02 -- 80mm Air-Spaced Triplet Apochromat Refractor Telescope Optical Tube Assembly with Accessories (gtin 8122570176076); ES-FF2F5/F7 -- Field Flattener for f/5 to f/7 Refractors (gtin 811803034297)
    • 80mm Air-Spaced Triplet Apochromat Refractor Telescope Optical Tube Assembly with Accessories

      × 1

    • Field Flattener for f/5 to f/7 Refractors

      × 1

  • Explore Scientific Warranty