en:ost:fokus_new

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en:ost:fokus_new [2022/10/27 08:38] – [General remarks] rhainichen:ost:fokus_new [2023/12/06 13:30] (current) – [General remarks] rhainich
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 ++++ Calculation of the ideal adapter | ++++ Calculation of the ideal adapter |
-The back focus of the telescope is 147 mm (behind the EFA). The eyepiece clamp used has a back focus of 12.5 mm. The length of the ideal adapter ''D'' is therefore calculated as follows:+The back focus of the telescope is 147 mm (behind the EFA). The Zeiss quick changer used has a back focus of 25 mm. The length of the ideal adapter ''D'' is therefore calculated as follows:
  
    D = 147 − 12,5 − 33/2 - C,    D = 147 − 12,5 − 33/2 - C,
  
-where ''C'' is the backfocus of the respective instrument. The STF-8300 together with all attachments has a backfocus of 57.5 mm. Therefore, the ideal adapter for the STF-8300 is 60mm long.+where ''C'' is the backfocus of the respective instrument. The STF-8300 together with all attachments has a backfocus of 57.5 mm. Therefore, the ideal adapter for the STF-8300 is 50mm long.
 ++++ ++++
  
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 | Canon 700D                |  20+10  |  13000  | | Canon 700D                |  20+10  |  13000  |
 | Baches + QHY268M          |  10      15000  | | Baches + QHY268M          |  10      15000  |
-| Baches + QHY268M + Barlow |  10     |  27000  | +| Baches + QHY268M + Barlow |  20     |  17500  | 
-| DADOS + QHY268M            10     |   7000  |+| DADOS + QHY268M             0     |  17000  |
 | Hyperionokular: 36mm      |  80      14500  | | Hyperionokular: 36mm      |  80      14500  |
 | Hyperionokular: 22mm      |  80             | | Hyperionokular: 22mm      |  80             |
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  • Last modified: 2022/10/27 08:38
  • by rhainich