Antares Focal Reducer/Corrector 6.3 (SCTFR)

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The Antares SCTFR is the standard thread-on F/6.3 4-element fully multicoated reducer/corrector used on F/10 Schmidt-Cassegrain telescopes. It is actually only a reducer, but it do es increase true field at the expense of some increase in spherical aberration and some vignetting (dimming) at the edge of the field. F6.3 Focal reducer for F/10 Schmidt-Cassegrain, 43mm aperture, 4-Element, Fully Multicoated Show more