Planewave - CDK600 Observatory System

SKU
PLA-240130Q
$98,000.00
Availability : In Stock Shipping Billed Separately
Does Not Qualify for Free Shipping

The PlaneWave Instruments CDK600 includes a Planewave CDK24 telescope and the L600 Direct Drive mount.  Designed for affordability and high demand applications, this is a high precision observatory system.  

The CDK24 features a truss tube design, 3 built in cooling fans and fused silica optical glass for maximized temperature stability. 

Prewired to accept Delta-T. 

The L600 direct drive mount can be configured in either AZ or EQ, and with no gears the L600 exhibits zero backlash and no periodic error.

High resolution encoders provide feedback to counteract gusts of wind and further enhance mount precision. 

If you choose to place an order for this item, you will be contacted for crating and shipping fee information and options.  To receive a quote contact us at [email protected]

 

Planewave - CDK600 Observatory System

The Planewave CDK600 is an observatory system built on the Planewave L600 direct drive mount paired with a CDK24 astrograph.  Designed and manufacturered in the U.S.A., Planewave's CDK systems build on the legacy of the PW-1000 1 meter telescope, Planewave has drawn from that same advanced optical system and high performance direct drive mount to meet the demands of research and educational observatories.   

This observatory system was designed for ease of use and affordability in mind.  While in Alt-Azimuth configuration, the system is considerably more compact than when in Equatorial configuration which allows for  smaller observatory footprint for applications requiring limited space or challenging builds.  

CDK24 Optical Tube: 

  • f/6.5 and 3974mm focal length
  • No coma, no off-axis astigmatism, and no field curvature.
  • Pinpoint stars across a 70mm image circle.
  • Rock solid fused silica mirrors with low thermal expansion.
  • Carbon fiber optical tube assembly for rigidity and fast cooling.
  • Simple secondary mirror collimation thanks to the fixed primary mirror.

The CDK24 (0.61 m) f/6.5 Corrected Dall-Kirkham Astrograph telescope has a dual truss design, with 3 cooling fans for the back of the primary mirror and 4 fans for the front surface of the primary mirror. The CDK24 covers a 70mm field of view without any field curvature, off-axis coma, or astigmatism. The optical tube weight is 240 lbs (109 kg) and comes standard with a back plate retaining ring ready to accept the focuser of your choice.

Prewired for Delta-T.  The CDK24 is ready to accept the optional Delta-T control hub.  

Planewave Fused Silica Mirrors

With a coefficient of thermal expansion 6 times lower than Borosilicate Pyrex glass, fused silica optical glass is exponentially more stable as temperatures change.  For long observing or imaging sessions, this added stability reduces the need to adjust focus.  

3D Printed Baffles

Using 3D printing technology, Planewave is able to produce a lightweight successive layers with highly precise positioning to minimize stray light and vignetting while maximizing contrast. 

Dovetail Expansion Joint

To provide additional thermal expansion stability, the CDK24 is equipped with an expansion joint to account for the different expansion rates of the carbon fiber trusses and the aluminum dovetail.  

Cooling Fans

Three rear cooling fans pull air through the optical tube near the primary mirror, and three additional fans blow air across the primary from the side of the telescope body.   This combination of fans and open truss design allow the CDK24 to reach thermal equilibrium quickly.   The fans are controlled by a manual switch on the optical tube or can be controlled with PWI3 software when the Planewave EFA kit is added. 

CDK vs. RC Optical Design

Ritchey Chretien optical design, though highly successful in eliminating many typical optical problems naturally found in preceding designs, does not correct off-axis astigmatism and field curvature.  While these issues can be corrected with the addition of correctors and flatteners as accessories to the telescope, David Rowe developed a new Corrected Dall Kirkham design that effectively incorporates these correctors into the optics. By utilizing an ellipsoid primary mirror, a spherical secondary mirror and a lens specifically configured doublet lens group, coma, off-axis astigmatism and field curvature are eliminated.  

L-600 Mount Features:

The L-Series mount combines versatility, simplicity and affordability by combining all the technology of our Observatory class telescopes into a compact stand-alone mount. In its Alt/Az configuration it is considerably more compact than its German equatorial counterpart, allowing a larger telescope to fit in a smaller enclosure. Unlike German Equatorial mounts, there are no meridian flips to deal with, and no large protruding counterweights to create a dangerous hazard in a public observatory. Alt/Az is more intuitive to use and no polar alignment is needed.

  • Direct-drive motors on each axis for smooth, fast, and virtually silent movement.  A lack of gears also eliminates backlash and periodic error.  
  • High resolution on-axis encoders provide feedback to counteract wind gusts.  
  • Maximum load capacity 300 pounds. 
  • Total system weight of 480 pounds. 
  • Slew speeds up to 50 degrees per second allowing for satellite tracking and fast target acquisition. 
  • High resolution encoders on each axis for precise positioning, sidereal accuracy of <0.30 arc seconds RMS over 5 minutes. 
  • Zero backlash
  • Zero periodic error
  • PointXP mount modeling software
  • Enclosed electronics
  • Through the mount cabling allowing for smart cable management with easy to access panels. 
  • Includes PWI4 software, ASCOM compliant, for mount control. 
  • A versatile mount, the L600 can be configured in either AZ or EQ. 
  • Azimuth dovetail balance system, for precise center of gravity balance regardless of configuration. 
  • Dual mounting bracket allows for the attachment of a second optical tube.  An optional dovetail clamp is required.  

CDK600 Specifications: 

CDK24 Specifications: 

Aperture

24 inch (610mm)

Focal Length

3974mm (156.46 inch)

Focal Ratio

f/6.5

Central Obstruction

47% of the primary mirror diameter

Backfocus from mounting surface

14.349 inch (364.46mm)

Weight

240 pounds 

OTA Length

56 inch (1422mm)

Body Design and Material

Carbon fiber trusses with an aluminum light shroud on the lower cage. 

OTA Width

31 inches (787mm)

OTA Height

35 inches (889mm)

Optimal Field of View

70mm Image Circle

Secondary Mirror Diameter

11 inches (280mm)

Secondary Mirror Material

Fused silica quartz

Secondary Mirror Shape

Spherical

Secondary MIrror Coating

Enhanced Aluminum - 96%

Primary Mirror Diameter

24 inch (610mm)

Primary Mirror Outer Diameter

24.5 inch (622mm)

Primary Mirror Shape

Prolate Ellipsoid

Primary Mirror Material

Fused Silica Quartz

Primary Mirror Coating

Enhanced Aluminum - 96%

Lens Group Diameter

135mm (5.31 inch)

Number of Lenses

2

Coating

Broadband AR Coatings (less than .5% reflects from 400 to 700nm

 

L600 Specifications: 

Mount Type Alt-Azimuth/ Equatorial Direct Drive Mount
Weight 338 pounds (153kg)
Max Load Capacity 300 pounds (136kg)
Latitude Range 0 to 90  degrees, North and South hemispheres
Cable Management Through mount cabling with easy access panels
Swing Through Length from AZ Axis 35.1"
Control Electronics Planewave interface dual axis telescope control
User Interface PWI4 control software with PointXP mount modeling software
Homing Sensors Home position sensors are included allowing the mount to find home on power up. 
Slew Rate 20 degrees per second standard; up to 50 degrees per second maximum on both axes
Power Requirement Accepts 120 to 240 VAC, supplied with 120 VAC 15A IEC type B regulated power adapter
Motor Control Industrial grade brushless motor control system with built in electronics
Motor - Azimuth and Altitude Direct drive 3 phase axial-flux torque motors 
Encoder - Azimuth and Altitude 152mm stainless steel encoder ring with reader built into the azimuth and altitude axes.  18,800,000 counts per revolution (0.069 arc seconds resolution). 
Motor Torque Approx. 20 ft lbs. continuous; 50 ft lbs. peak
Drive Electronics  Industrial grade, off the shelf brushless motor drives for each axis with custom designed interface card. 
Telescope Control Software PWI4, PointXP, HTTP and ASCOM control interfaces.  MaximDL is required for camera control when building a pointing model within PWI4 software. 
Pointing Accuracy <10 arcsecond RMS with PointXP model
Pointing Precision 2 arcseconds at sidereal velocity
Tracking Accuracy <0.3 arcseconds over a 5 minute period at sidereal velocity
System Natural Frequency 10 Hz or greater

Shipping Information

The crated weight of the CDK600 system is 500 pounds (226.8.kg), 40x48x70 inches. This is an oversize and heavy crated shipment that does require air, ship or truck freight delivery.  At this time our website is not able to calculate shipping rates for freight You will be contacted to discuss shipping options and crating fees for your order.  If you require a quote at any time prior to placing an order, please reach out to us at [email protected]

More Information
Brand PlaneWave Instruments
Free Shipping Does Not Qualify for Free Shipping
Aperture 24"
Case Included No
Focal Length 3974mm
Focal Ratio F/6.5
Focus Type None - OTA ready to accept your choice of focuser
Finderscope Included None
Diagonal Included None
Optical Tube Material Carbon Fiber
Optical Coatings Aluminum
Optical Tube Length 56"
Optical Tube Diameter 31x35"
Optical Tube Weight 240 pounds
Included Dovetail D series with expansion joint
Mount Load Capacity 300 pounds.
Accessory Tray Included? No
Counterweights Included None
Adjustable Legs? No
Slew Speeds 20 degrees per second standard; up to 50 degrees per second maximum on both axes
Mount Motor Drive Direct Drive
GPS No
Includes Autoguide Port Yes
USB Port Yes, for mount to computer connection and control
Power Requirements Accepts 120 to 240 VAC, supplied with 120 VAC 15A IEC type B regulated power adapter.
Computerized Hand Controller Included for visual observing
Included Software PWI4 with PointXP mount modeling
Periodic Error Correction No
Total System Weight 578 pounds
Warranty 1 year on optics, 2 years on mechanical.
In The Box
  • CDK24 Optical Tube
  • Cooling Fans
  • Prewired for Heaters - Ready to Accept DeltaT
  • OTA Cover
  • L600 Direct Drive Mount
  • Flashdrive for instructions and software.
  • 16' USB Cable
  • 120 VAC power cable
  • Standard Allen Key set
  • Gamepad for manual control
  • 6 1/2-13x1 1/4" socket head cap screws to bolt the mount to th e pier or wedge.
  • 6 1/2-13 washers.
  • 1 extended length shoulder bolt for RA axis to EQ wedge alignment. 
  • CDK24 Optical Tube
  • Cooling Fans
  • Prewired for Heaters - Ready to Accept DeltaT
  • OTA Cover
  • L600 Direct Drive Mount
  • Flashdrive for instructions and software.
  • 16' USB Cable
  • 120 VAC power cable
  • Standard Allen Key set
  • Gamepad for manual control
  • 6 1/2-13x1 1/4" socket head cap screws to bolt the mount to th e pier or wedge.
  • 6 1/2-13 washers.
  • 1 extended length shoulder bolt for RA axis to EQ wedge alignment. 
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