Planewave Europe

PlaneWave CDK24 Astrograph f/6.5

The CDK24 is a 24 inch (0.61 m) f/6.5 Corrected Dall-Kirkham Astrograph telescope. The CDK24 covers a 70 mm field of view without any field curvature, off-axis coma, or astigmatism. The instrument weight is 240 lbs (109 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. The CDK design far exceeds the off-axis performance of most commercial telescope designs including the Ritchey-Chrétien design. More about the Optical Design (CDK).

The telescope is also available in Ritchey-Chrétien (RC) optics and infrared optimized.

CDK24 Astrograph, 24 inch with Fused Silica Optics
modified to Dall-Kirkham, 610 mm aperture and 70 mm field of view without any curvature, off-axis coma, or astigmatism
local length 3.962 mm (f/6.5)
Delta T Ready, 3,5" Hedrick Focuser and EFA Kit separately available
Requires a crating #1323524. The crating will be charged extra

Fused Silica

Fused Silica is a synthetic amorphous silica glass of the highest purity and one of the most transparent glasses made. The optical and thermal properties of fused silica are superior to other types of glass due to its purity. Its transmission and homogeneity exceed those of crystalline quartz without the problems of temperature instability inherent in the crystalline form. Fused Silica has a coefficient of thermal expansion six times lower than Borosilicate (Pyrex) glass, which means that as fused silica cools down, it preserves its shape to a high degree of accuracy. This translates into consistent optical performance and unchanging focus over temperature changes. With its high melting temperature ()~ 1.600 degree Celsius), a very low coefficient of thermal expansion and resistance to thermal shock, fused silica is the material of choice for professional observatories as well as various scientific applications.

Scope of delivery

Heating elements for dew prevention – The heating pads on the primary and secondary mirror require the #1329110 Delta-T controller sold separately
OTA Cover - To protect the primary mirror and inside of the optical tube
Flashdrive – Contains software and ins tructions for collimation and spacing the primary to secondary mirror
Wrench Set(5812A35) – Standard hex wrench (European orders only)
Soft cover for secondary mirror
12v AC adapter
Back plate to focuser spacer (attached)

Shipping: dimensions and weight

Width

40 inch (1,016 mm)

Height

48 inch (1,219 mm)

Length

78 inch (1,981 mm)

Weight

500 lbs (226.8 kg)

The information is only a rough estimate! The actual shipping dimensions and weight may differ.

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