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Dr. Claus Possberg

Customer Review of the CDK17" Planewave Astrograph

The Planewave CDK17 is an optically excellent, rigid, collimation and temperature stable reflector telescope of professional design. I converted the antiquated electric focus drive to a modern, silent focus motor and installed the original 0.66x reducer for f4.5 at 1965mm focal length. A full frame camera is impeccably illuminated, there are no chromatic aberrations despite the reducer. The image quality, assuming really good seeing of 1.1...1.4" (we have this about 20 nights a year here), is absolutely captivating and sufficient for the extremely high-resolution, cooled camera with the fantastic Sony BSI sensor with 61 megapixels.

Discover the whole equipment of Mr. Plossbergs observatory also on our observatory-map.