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CDK12.5 Astrograph f/8 with Fused Silica Optics

# 1323212Q Price: € 15,900.00
(Price incl. German VAT excl. shipping)

PlaneWave CDK12.5 Astrograph f/8

After the successful introduction of the CDK 20" Astrograph from PlaneWave for few years ago, the CDK 12.5" is now available in a smaller and even more affordable aperture. The CDK 12.5" is an Astrograph in the price-range of many amateur-astronomers.

The abbreviation CDK stands for the optical system of the PlaneWave astrographs - a Dall Kirkham Cassegrain with a optical correction unit. The result is the CDK 12.5" which is free from off-axis coma and off-axis astigmatism, yielding a perfectly flat field all the way out to the edge of a 52mm image circle. More about the Optical Design (CDK).

  • CDK12.5 Astrograph, 12.5 inch with Fused Silica Optics
  • modified to Dall-Kirkham, with fully corrected image field
  • 3" Dovetail, focal length 2.541 mm (f/8)
  • Delta T Ready, 3,5" Hedrick Focuser (without EFA Kit)
  • Requires a crating #1323512. The crating will be charged extra
Fused Silica
Spot diagrams
Scope of delivery
Recommended Accessories


Optical Design
Corrected Dall-Kirkham (CDK)
Aperture (mm)
12,5" (318mm)
Focal Length
2.541 mm (100.04 inch)
Focal Ratio
Image Field
52 mm
Back Focus Distance
10.45inch (265 mm) from Mounting Surface, 7,2 inch (183 mm) from Racked in Focuser
Central Obstruction
42% of the Primary Mirror
Fused Silica
Optical length
31 inch (787 mm)
Optical Tube Weight
46 lbs (21 kg)
No mount (OTA only)
PlaneWave Instruments
Manufacturer SKU
EAN Code

PlaneWave Live: CDK12.5 Astrograph f/8


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