Starguide - A Practical Guide to Astro-Photography

• Move the telescope to a brighter star near your target object (or use the same star already used for the star alignment)
• Cover your scope with a Bhatinov Mask
• If using a DSLR camera:
• activate LiveView on your DSLR camera
• set magnification to maximum in LiveView
• If using a CCD camera
• in SGPro: Open either the Focus Tab on the Control Panel 
• in SharpCap: use the Focus Assistant (e.g. using the Fourier Detail Detection, see Tools > Focus Assistant > Fourier Detail Detection) included
• in ASIAIR App: see this description
• In either case watch the diffraction pattern that you see:
  
• Now move your focus  
• manually by turning the knobs of the focuser (when no electric focuser is installed)
• by using the hand controller of the iOptron mount
• by using some software that can control an electric focuser , e.g. SGPro 
• until you get the best diffraction pattern (either in you camera or in applications like SGPro)
• When done take off the Bhatinov Mask from the telescope

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