What makes the Explore Scientific ED80-FCD100 an "Apochromatic" (APO) refractor?
An apochromatic refractor brings three wavelengths of light (red, green, and blue) to the same focal point. The Explore Scientific ED80-FCD100 achieves this using a three-element (triplet) lens design that incorporates a special lens made from HOYA FCD100 extra-low dispersion (ED) glass. This virtually eliminates chromatic aberration, or false color, resulting in significantly sharper, higher-contrast images than standard achromatic refractors.
How does the HOYA FCD100 glass in the ED80-FCD100 perform?
HOYA FCD100 is a premium optical glass known for its extremely low dispersion properties, which are critical for color correction. Its performance is widely considered to be on par with Ohara's FPL-53 glass, another benchmark material for high-end apochromatic refractors. This allows the ED80-FCD100 to deliver views with true-to-life color and excellent contrast.
Is the focuser on the ED80-FCD100 suitable for astrophotography with a DSLR?
Yes. The telescope features a heavy-duty hexagonal focuser specifically designed to handle the weight of an astrophotography setup. It provides a rigid and stable platform that prevents sagging or flexure, even with a DSLR, filter wheel, or dedicated astronomy camera attached, ensuring your focus remains sharp throughout an imaging session.
Can the Explore Scientific ED80-FCD100 be used for both visual observing and imaging?
Absolutely. The ED80-FCD100 is designed as a versatile, high-end instrument. Its superb color correction and contrast make it a joy for visual observation of the Moon, planets, and bright deep-sky objects. At the same time, its robust focuser and clean optics make it an excellent astrophotography platform.
How would the ED80-FCD100 perform visually on a target like the Orion Nebula (M42)?
On the Orion Nebula (M42), the ED80-FCD100's apochromatic optics would provide a high-contrast view with pinpoint stars. The lack of chromatic aberration means the bright stars of the Trapezium cluster at the nebula's core would resolve cleanly without distracting purple halos. You could expect to see fine details and structure within the nebulosity against a dark sky background.
Can I use the ED80-FCD100 as a guide scope on a larger SCT for imaging the Andromeda Galaxy (M31)?
Yes, the ED80-FCD100 is an excellent choice for a high-quality guide scope. Its lightweight and compact design make it easy to mount on a larger instrument, like a Schmidt-Cassegrain Telescope (SCT). When paired with a guide camera, its sharp optics will provide the precise tracking necessary for long-exposure images of large targets like the Andromeda Galaxy (M31).
