PlaneWave - 17" CDK17 Corrected Dall-Kirkham Carbon Fiber Truss Telescope

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The latest member of the CDK family is the CDK17 New and Improved in 2013. The CDK optical design is the innovative solution for unsurpassed astro-imaging quality at an affordable price.

SKU: 170101
Manufactured by:
PlaneWave Instruments
 

Product Description

The PlaneWave Instruments CDK17 is a 17 inch (0.43 m) f/6.8 Corrected Dall-Kirkham Astrograph telescope. The CDK17 has a dual carbon-fiber truss design, with 3 cooling fans ejecting air from the back of the telescope, and 4 fans blowing across the boundary layer of the mirror's surface. The CDK17 covers a 70 mm field of view without any field curvature, off-axis coma, or astigmatism. The instrument weight is 106 lbs (48 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 17.5 inch (445 mm)
Aperture 17 inch (432 mm)
Focal ratio f/3.24
Mounting Laser Collimated and Permanently Fixed
Material Precision Annealed Pyrex
Shape Prolate Ellipsoid
Coating Broadband AR Coatings (less than .5% reflected from 400 to 700nm)

 

SECONDARY MIRROR

Diameter 190 mm (7.48 inch)
Material Precision Annealed Pyrex
Shape Spherical
Coating Broadband AR Coatings (less than .5% reflected from 400 to 700nm)

INCLUDED ACCESSORIES 

Ronchi Spacer (600341 & 600343) 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 Containing all documentation and software for collimation and spacing
12VDC Power Supply Provides power for the fans (Not included for European Orders)
Wrench Set (5812A35) English Hex Wrenches (European Orders Only)

 

C/2012 S1 (ISON)

 

Copyright Tim Stone


Technical Card

  • Imaging telescopes or lenses: Planewave Instruments CDK 17
  • Imaging cameras: Apogee U16M
  • Mounts: Software Bisque Paramount ME
  • Guiding telescopes or lenses: Planewave Instruments CDK 17
  • Guiding cameras: SBIG STi
  • Software: Maxim DL, photoshop
  • Filters: Astrodon E-series 2 L,  Astrodon E-series R,  Astrodon E-series B,  Astrodon E-series G
  • Accessories: Astrodon Monster MOAG
  • Resolution: 1496x1496
  • Dates: Nov. 14, 2013
  • Locations: Sugar Grove Observatory
  • Frames: 45x60"
  • Integration: 0.8 hours
  • Avg. Moon age: 11.25 days
  • Avg. Moon phase: 86.62%

Description

Data acquired by Bob Finnigan and Carl Wenning at the SGO the morning of November 14. The original is more "raw" and the second version is processed to remove stars and enhance color contrast to a degree. The transition from cyanogen-dominated emission to the blue ion tail is clearer in the second version. In the final version, I reprocessed, aligning on the stars rather than the comet, and added the stars back in for a more natural view.

Incidentally, the slight smudge below the tail is a galaxy, PGC 43020 at 13th magnitude.

Astrometry from TheSkyX Pro:

  • Center RA: 12h 46m 09.0s
  • Center Dec: -06° 04' 16.3"
  • Scale: 1.25 arcseconds/pixel
  • Size (pixels): 1763 x 1763
  • Angular Size: 0° 36' 53" x 0° 36' 53"
  • Position Angle: 353° 58' from North
  • RMS: 0.71 (X: 0.52 Y: 0.48)
  • Number of Stars Used in Solution: 112 (99%)
  • FWHM: 5.31 pixels, 6.66 arcseconds

 

Data acquired at the Sugar Grove Observatory, a facility of Twin City Amateur Astronomers (tcaa.us).

 

 

op+mw

Specifications

Name PlaneWave - 17" CDK17 Corrected Dall-Kirkham Carbon Fiber Truss Telescope
Manufacturer PlaneWave Instruments
Model 170101
Custom Stock Status This item typically has a delivery time of 8-12 weeks. Place your order today to reserve.
Aperture 17 inch (432 mm)
Focal Length 2939 mm (115.71 inch)
Focal Ratio F/6.8
Optical Design Corrected Dall-Kirkham

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