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PlaneWave - 24" CDK Corrected Dall-Kirkham Astrograph Telescope Carbon Fiber Truss Telescope

Model#: 240101

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Availability: In stock

$50,000.00

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Manufactured by: PlaneWave Instruments

Details

Introducing the PlaneWave Instruments CDK24, a 24 inch (0.61 m) f/6.8 Corrected Dall-Kirkham Astrograph telescope. The CDK24 has a dual truss design, with 3 cooling fans for the back of the primary mirror and 8 fans for the front surface of the primary mirror. The CDK24 covers a 70 mm field of view without any field curvature, off-axis coma, or astigmatism. The instrument weight is 240 lbs (109 kg) and comes standard with a back plate retaining ring ready to accept the focuser of your choice. 

 STANDARD FEATURES

Carbon Fiber Truss Design Minimizes thermal expansion which causes focus shift with changes in temperature
Dovetail expansion joint Allows for the difference in thermal expansion between carbon fiber and aluminum. The expansion joint allows the aluminum dovetail expand and contract without stressing the carbon fiber lower truss
Cooling Fans Three cooling fans ejecting air from the back of the telescope and four fans blowing across the boundary layer of the mirror surface. This helps the telescope to reach thermal equilibrium quickly. The fans are controlled by a computer if the optional Electronic Focus Accessory (EFA Kit) is purchased.

PRIMARY MIRROR

Diameter 24.5 inch (622 mm)
Aperture 24 inch (610 mm)
Focal ratio f/3.2
Mounting Laser Collimated and Permanently Fixed
Material Precision Annealed Borosilicate
Shape Prolate Ellipsoid
Coating Enhanced Aluminum - 96%

 

SECONDARY MIRROR

Diameter 9.45 inch (240 mm)
Material Precision Annealed Borosilicate
Shape Spherical
Coating Enhanced Aluminum - 96%

  INCLUDED ACCESSORIES 

CDK24 Focus Spacer (240343) This 5.3" long spacer may be installed between the backplate and the focuser to take up some of the CDK24's extra backfocus and reduce the torque placed on the focuser mechanism. This spacer is sized such that the backfocus distance behind the focuser will match that of the CDK20.
Ronchi Spacer (200354) This spacer sits in place of a focuser and is used for setting the primary to secondary spacing. It has an 1-1/4 inner diameter and may be used with 1-1/4 oculars for collimation.
Ronchi Ocular This ocular is a Ronchi screen used for setting the primary to secondary spacing.
Primary Mirror Cover The Primary Mirror Cover protects the primary mirror.
Planewave thumb drive Includes instructions for Collimation and Spacing and software.
12VDC Power Supply Provides power for the fans (Not included for European Orders)
Wrench Set (5812A35) English Hex Wrenches (European Orders Only)

   

 

 

 

 

 

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Product Series

The CDK telescope is a brand new optical design invented by Dave Rowe. The goal of the design is to make an affordable astrographic telescope with a large enough imaging plane to take advantage of the large format CCD cameras of today. Most telescope images degrade as you move off-axis from either coma, off-axis astigmatism, or field curvature. The CDK design suffers from none of these problems. The CDK is coma free, has no off-axis astigmatism, and has a flat field. The design is a simple and elegant solution to the problems posed above. The CDK consists of three components: an ellipsoidal primary mirror, a spherical secondary mirror and a lens group. All these components are optimized to work in concert in order to create superb pinpoint stars across the entire 42mm image plane.

Additional Information

Name PlaneWave - 24" CDK Corrected Dall-Kirkham Astrograph Telescope Carbon Fiber Truss Telescope
Manufacturer PlaneWave Instruments
Model 240101
Aperture 24 inch (610 mm)
Central obstruction 47% of the Primary Mirror Diameter
Diameter of Primary Mirror 24.5 inch (622 mm)
Focal Length 3962 mm (155.98 inch)
Focal Ratio F/6.5
Focal ratio of primary mirror f/3.2
Material (primary mirror) Precision Annealed Borosilicate
Mounting (primary mirror) Laser Collimated and Permanently Fixed
Optical Coatings Enhanced Aluminum - 96%
Optical Tube Length 56 inch (1,422 mm)
Optimal field of View 70 mm (58 arcminute)
Shape (primary mirror) Prolate Ellipsoid