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Astro-Tech Schmidt-Cassegrain f/6.3 Focal Reducer Field Flattener
$89.95This combination f/6.3 focal reducer/corrector lens reduces the focal ratio of all Celestron 5" through 14" Schmidt-Cassegrain telescopes, as well as all Meade 8" through 16" SCTs . . .
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Astro-Tech 2" Field flattener for imaging with Astro-Tech and TMB refractors
$149.95The Sky & Telescope Hot Product for 2010 Astro-Tech 2" photographic field flattener improves the image sharpness at the corners of the field with Astro-Tech and TMB apo refractors, but will also work well with any other brand of f/6 to f/8 refractor, as well as Astro-Tech Ritchey-Chrétiens . . .Out of stock
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Astro-Tech AT152EDT .72x Reducer Field Flattener
$299.00The Astro-Tech AT152FF 0.72x focal reducer/field flattener is designed specifically for prime focus astrophotography with the AT152EDT triplet refractor.
Out of stock