====== OST - Basics ======

===== CDK20 - Tube =====

/*
|< 50% - >|
^ Type                     | Schmidt-Cassegrain |
^ Diameter                 | 356 mm  |
^ Focal length             | 3910 mm  |
^ Spacial resolution       | 0.23''   |
^ Length of the tube       | 78 cm |
^ Weight                   | 20.4kg |


[{{ ost:cdk20:cdk20_1.jpg?380| OST 2.0: The CDK20 from Planewave}}]
*/

<WRAP group>
<WRAP half column>
|< 100% - >|
^ Type                     | Corrected Dall-Kirkham (CDK) |
^ Diameter                 | 508 mm |
^ Central obstruction      | 198 mm |
^ Focal length             | 3454 mm |
^ Focal ratio              | f/6.8 |
^ Spacial resolution       | 0.3'' |
^ Image field              | 52 mm |
^ Mirror substrate         | Fused Silica |
^ Length of the tube       | 1194 mm |
^ Back focus distance      | 147 mm (behind the focuser) |
^ Weight                   | 64 kg |

</WRAP>
<WRAP half column>
[{{ ost:cdk20:img_1136.jpg| OST 2.0: The CDK20 from Planewave with the QHY600M and Sti}}]
</WRAP>
</WRAP>

\\
===== Mounting =====
[{{ :ost:telescope:teleskop_achsen.jpg?350|Axes}}]

The mounting consists of 2 perpendicular axes:
    * right ascension (1)
    * declination (2). 
The right ascension axis is parallel to the Earth axis, pointing towards the northern/southern celestial pole on the northern/southern hemisphere, respectively. The declination axis points towards the celestial equator. The [[en:ost:telescope:setup| setup]] is described in a dedicated article. 

|< 50% - >|
^Manufacturer | 10 MICRON |
^Model        | GM 4000 QCI |
^Type         | German equatorial mount |

\\
===== Coordinates =====

|< 70% - >|
^             | Degree, minutes, seconds | Decimal degrees | Degree, decimal minutes |
^Latitude     | 52° 24' 33,0624″ N | 52.409184 | 52° 24.55104 N |
^Longitude    | 12° 58' 23,4666″ E | 12.973185 | 12° 58.39111 O |
^Altitude     | 39 m $\pm$ 5 m       |

===== Handling =====
Introductions to the general [[en:ost:telescope:handling_new| handling of the technology]] and to the [[en:ost:ccds:maximdl| usage of Maxim DL]] are of course also available.
===== Dome =====

The [[en:ost:telescope:kuppel | dome]] is made out of fibre-reinforced plastic (FRP). It was built and set up by Baader-Planetarium. The dome automatically follows the movement of the telescope. However, the azimuth, the hatch, and the shutter can be manually controlled by an infrared remote control. 

|< 50% - >|
^Diameter | 5.2 m|

/*=== Telescope interface ===*/