What is a CDK?
The Ceravolo 300 Astrograph is a Cassegrain two mirror telescope that employs lenses near the focus to produce sharp images across a large detector. The Ceravolo 300 Astrograph is what has become known recently as a "CDK" or "Corrected Dall-Kirkham" variant of the basic Cassegrain form. While there are many variations of the Cassegrain telescope we believe the CDK is perhaps the best suited to large format CCD imaging.
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