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CDK17 Astrograph f/6.8 with Fused Silica Optics

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Price: € 30,250.00
(Price incl. German VAT excl. shipping)
Price: € 25,420.17
(Price excl. German VAT excl. shipping)

PlaneWave CDK17 Astrograph f/6.8

The PlaneWave Instruments CDK17 is a 17 inch (0.43 m) f/6.8 Corrected Dall-Kirkham Astrograph telescope. 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.

The abbreviation CDK stands for the optical system of the PlaneWave astrographs - a Dall Kirkham Cassegrain with a optical correction unit. More about the Optical Design (CDK)

  • CDK17" Astrograph, 17 inch with Borosilicate Optics or Fused Silica Optics
  • modified to Dall-Kirkham, with fully corrected image field
  • focal length 2.939 mm (f/8)
  • Delta T Ready, 3,5" Hedrick Focuser and EFA Kit separately available

 

 

Fused Silica
Spot diagram

PlaneWave Live: CDK17 Astrograph f/6.8

Specifications

Optical Design
Corrected Dall-Kirkham (CDK)
Aperture (mm)
17" (432 mm)
Focal Length
2.939 mm (115.71 inch)
Focal Ratio
f/6.8
Image Field
70 mm
Back Focus Distance
10.24" (260 mm) from Mounting Surface, 7.24" (184 mm) from Racked in Focuser
Central Obstruction
23.7 % by surface area, 49% of the Primary Mirror Diameter
Substrate
Fused Silica
Optical length
42 inch (1.067 mm)
Optical Tube Weight
106 lbs (48 kg)
Mount
No mount (OTA only)
Manufacturer SKU
170101Q
SKU
1323217Q

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