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Capturing the most stunning astrophotographs possible is something our team is passionate about. From design to manufacture, our goal with the Corrected Dall-Kirkham (CDK) 12.5″ telescope was centered around performance and ease of use. The CDK12.5 is an incredible breakthrough in telescope technology and produces no off-axis coma and no off-axis astigmatism. Additionally, the CDK12.5 provides a perfectly flat field so your astrophotographs will have stunning clarity from corner to corner of the image without field curvature degrading the photos. Offering the simplicity of single-mirror collimation, the stray light control of advanced baffles, structural performance created through finite element analysis (FEA), and decades of telescope design experience, the CDK12.5 is an exceptional diffraction-limited telescope. CDK12.5 users can experience pinpoint stars edge-to-edge and a 70 x 70 arcminute field of view when using large 16803 size camera sensors. When equipment fades into the background and simply performs, the astrophotography experience becomes even more fun and rewarding!

PlaneWave CDK12.5 Optical Tube Assembly

Sales Tax Included
  • Optical System

    Aperture 12.5 inch (318 mm)
    Focal Length 2541 mm (100.04 inch)
    Focal ratio f/8
    Central Obstruction 42% of the primary mirror diameter
    Back Focus from Mounting Surface 10.445 inch (265 mm)
    Back Focus from Racked in Focuser 7.2 inch (183 mm)
    OTA Length 31 inch (787 mm)
    Optical Tube Carbon fiber
    Dimensions Overall Dimensions (PDF)
    Weight (includes manual-focuser and dovetail) 46 lbs (20.9 kg)
    Weight (includes electronic-focuser and dovetail) 48.5 lbs (22.0 kg)
    Optimal Field of View 52mm image circle

    Secondary Mirror

    Diameter 4.65 inch (118 mm)
    Material Fused silica (quartz)
    Shape Spherical
    Coating Enhanced aluminum – 96%

    Primary Mirror

    Optical Diameter 12.5 inch (318 mm)
    Outer Diameter 13 inch (330 mm)
    Shape Prolate ellipsoid
    Material Fused silica (quartz)
    Coating Enhanced aluminum – 96%

    Lens Group

    Diameter 70 mm (2.76 inch)
    Number of lenses 2
    Coating Broadband AR coatings (less than .5% reflected from 400 to 700nm)


    Crated Shipping Weight 163 lbs   (73.9 kg)
    Crate Width 22 inch   (559 mm)
    Crate Height 29 inch   (737 mm)
    Crate Length 48 inch   (1,219 mm)
  • Motorized 2.75″ Hedrick Focuser Offers 1.3″ of focuser travel and takes up 3″ of backfocus. Requires the 125901 EFA kit sold separately
    Heating elements for dew prevention The heating pads on the primary and secondary mirror require the 600195 Delta-T controller sold separately
    OTA Cover To protect the primary mirror and inside of the optical tube
    Flashdrive Contains software and instructions for collimation and spacing the primary to secondary mirror
    Cable connector for fan power Provides a connection method for powering for the fans if the user does not have the 125901 EFA kit. User must provide 12VDC powersupply 2.1 barrel jack connector that is center positive. (Not included for European orders)
    Wrench Set (5812A35) Standard hex wrenches (European orders only)
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