PlaneWave CDK17 Optical Tube Assembly

Starting Price: $22,500.00
Price as Configured: $22,500.00
Brand: PlaneWave Instruments / SKU: PW-170101Q
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 94 lbs (43 kg) and comes standard with a back plate retaining ring ready to accept the focuser of your choice.

NOTE: Shipping cost will be determined after the order is made and must be paid for before the telescope will ship. A shipping quote can be obtained on request.
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PW-6009003 - PlaneWave Finder Scope and Mounting Bracket
PW-6009003 - PlaneWave Finder Scope and Mounting Bracket
About This Product
The finder mounting plate attaches to the back plate of the telescope and the quick-release finder bracket attaches to the mounting plate. If the telescope used in on a German Equatorial Mount, it may be convenient to purchase two finder scopes - one for the east and one for the west side of the telescope. The finder scope is a Baader 10x60 Varios with mounting rings and L-bracket. The back plate of all of the PlaneWave CDK models has four mounting positions for a finder mounting plate.
$460.00 each
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PW-6009003 - PlaneWave Finder Scope and Mounting Bracket
PW-6009003 - PlaneWave Finder Scope and Mounting Bracket
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PW-6009003 - PlaneWave Finder Scope and Mounting Bracket
About This Product
The finder mounting plate attaches to the back plate of the telescope and the quick-release finder bracket attaches to the mounting plate. If the telescope used in on a German Equatorial Mount, it may be convenient to purchase two finder scopes - one for the east and one for the west side of the telescope. The finder scope is a Baader 10x60 Varios with mounting rings and L-bracket. The back plate of all of the PlaneWave CDK models has four mounting positions for a finder mounting plate.
PW-170398 - PlaneWave Counterweight Bracket for CDK17
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PW-125166 - PlaneWave Reducer 0.66X CDK12.5/14/17
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PW-125166 - PlaneWave Reducer 0.66X CDK12.5/14/17
About This Product

This is a reducer designed specifically for flat field telescopes like the CDK. This reduces the f ratio of the CDK telescope 66%. The CDK12.5 f/8 telescope will be reduced down to f/5.3. The CDK14 will be f/4.8  and for CDK17 f/6.8 will be reduced to f/4.5

**NOTE – 125166 adapter is compatible with CDK17 that have 10.24″ back focus.   CDK17 with 8.81″ back focus will use the 200166 focal reducer. See instruction manual for details.

PW-170915 - PlaneWave Ronchi Eyepiece and Adapter Kit for CDK17
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PW-170915 - PlaneWave Ronchi Eyepiece and Adapter Kit for CDK17
About This Product
INCLUDES: CDK BACKPLATE ADAPTER, RONCHI EYEPIECE, and RONCHI EYEPIECE SPACERS (CDK17WF SPECIFIC SPACER + CDK14-CDK24 STandARD SPACER)
PW-170970-KIT - PlaneWave CDK17 Spandex Shroud and Spacer SET
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PW-170970 - PlaneWave CDK17 Upper Cage Light Shroud
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PW-170970 - PlaneWave CDK17 Upper Cage Light Shroud
About This Product
This is a spandex fabric light shroud that blocks out stray light and minimizes dust on the primary mirror.
PW-170350 - PlaneWave Solid Aluminum Shroud CDK17 (Factory Installation Required)
PW-170350 - PlaneWave Solid Aluminum Shroud CDK17 (Factory Installation Required)
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PW-170350 - PlaneWave Solid Aluminum Shroud CDK17 (Factory Installation Required)
About This Product
NOTE: Shipping cost will be determined after the order is made and must be paid for before the item will ship. A shipping quote can be obtained on request.
PW-1702103 - PlaneWave Sliding Counterweight System Rail & Brackets for CDK17
PW-1702103 - PlaneWave Sliding Counterweight System Rail & Brackets for CDK17
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PW-1702103 - PlaneWave Sliding Counterweight System Rail & Brackets for CDK17
About This Product
Requires sliding weight system counterweights, not included.
PW-170150 - PlaneWave Counterweight Accessory for CDK17
PW-170150 - PlaneWave Counterweight Accessory for CDK17
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PW-170150 - PlaneWave Counterweight Accessory for CDK17
About This Product
This PlaneWave counterweight accessory mounts to the front ring of the CDK17 for critical balance in declination. The kit comes with a mounting bracket and three 0.5lb weights. Additional weights (PW-125382) can be purchased separately.
PW-DDP-8004 - PlaneWave Televue - 2" 90º Everbrite Diagonal
PW-DDP-8004 - PlaneWave Televue - 2" 90º Everbrite Diagonal
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PW-DDP-8004 - PlaneWave Televue - 2" 90º Everbrite Diagonal
About This Product
TELEVUE - 2" 90º EVERBRITE DIAGONAL W/2”-1¼” ADAPTER
QTY:  
Price as Configured: $22,500.00

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OPTICAL SYSTEM

Optical Design Corrected Dall-Kirkham
Aperture 17 inch (432 mm)
Focal Length 2939 mm (115.71 inch)
Focal ratio F/6.8
Central Obstruction 23.7% by surface area; 48.6% of the Primary Mirror Diameter
Back Focus from Mounting Surface 10.24 inch (260 mm)
Back Focus from Racked in Focuser 7.24 inch (184 mm)
Weight 106 lbs (48 kg)
OTA Length 42 inch (1067 mm)
Optical Performance 6.5 micron rms at 21mm and 9.6 micron at 26mm off-axis
Upper Cage Carbon Fiber Truss
Lower Cage Carbon Fiber Truss with Carbon Fiber Light Shroud
Optimal Field of View 70mm Image Circle

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 Enhanced Aluminum - 96%

SECONDARY MIRROR

Diameter 190 mm (7.48 inch)
Material Precision Annealed Pyrex
Shape Spherical
Coating Enhanced Aluminum - 96%

LENS GROUP

Diameter 105 mm (4.13 inch)
Number of lenses 2
Coating Broadband AR Coatings (less than .5% reflected from 400 to 700nm)

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.
SHIPPING
Crated Shipping Weight 225 lbs   (102.1 kg)
Crate Width 30 inch   (762 mm)
Crate Height 37 inch   (940 mm)
Crate Length 58 inch   (1,473 mm)
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)