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Explore Scientific Aluminum ED80 APO Triplet with Hoya FCD100
which now has 55 mm of back focus (+/- 2 mm)
Heavy-duty plastic thumbscrews are included
resulting in the observed pattern
Explore Scientific 2" Coma Corrector
Explore Scientific 2" Field Flattener with Canon T-Mount Software_Starry Night Pro Plus 7 Explore Scientific Aluminum ED80 APOExplore Scientific 2" Field Flattener A curved focal plane is an inherent feature in most telescope designs and is nothing to note for general stargazers. But, for astrophotographers, the consequences of that same curved plane can ruin hours of patient imaging. Designed for refracting telescopes, Explore Scientifics Field Flattener can tackle the edge of field aberrations caused by this necessary curvature to ensure your long night at the eyepiece