Starguide - A Practical Guide to Astro-Photography

• Follow the steps described in the chapter Manual Focusing using a Bhatinov Mask
• in SGPro:

• Open either the Focus Tab on the Control Panel in SGPro  (View > Show Control Panel  or CTRL+E) and go to the Focus tab 
  
• Disable the check box "Use auto focus"
• Binning: 2x2
• Exposure: 1 or 2  seconds depending on your target        
  
  
• or use the Frame and Focus module 
  (to activate the Frame and Focus module click on the Frame and Focus symbol on top of the SGPro window)
   
  
  
  
  
• and use following settings:
• Binning: 2x2
• Exposure: 1 or 2  seconds depending on your target
  
  
• In either case click on Start to begin a series of exposures 
  
  
• To start, set  the focuser to a position near to the optimal focus position from the Focus Table 
• Move your focus manually until you get the best diffraction pattern (either in you camera in in SGPro
• When done take off the Bhatinov Mask from the telescope
• This procedure can be enhanced by setting up a Target and Focus Position in the telescope tab.  

Alternatively you can also use the Image History (sequencegeneratorpro.com) HRF and Start Count module to optimize the focus setting: 

• HFR should as low as possible
• Star count as high as possible
  

See also Manual Focus in SGPro.

updated: 2020-02-22

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