The PlaneWave Telescope CDK (Corrected Dall-Kirkham) is a revolutionary new telescope optical system that was designed to excel at imaging on large format CCD cameras while remaining an excellent instrument for visual use. Created to meet the demands of both the serious imager and visual observer, the CDK brings an unprecedented value considering the quality and aperture. One advantage of the CDK design is its ease of collimation and achievable centering tolerance for a telescope of its class. This assures the user will get the best possible performance out of the telescope. The end result is a telescope which is free from off-axis coma, off-axis astigmatism, and curvature of field while still yielding a perfectly flat field all the way out to the edge of the largest CCD sensors available. Today PlaneWave makes a full line of CDK and Ritchey-Chrétien (RC) telescopes of the highest quality on the market.