Starguide - A Practical Guide to Astro-Photography

Dithering is an important method of astrophotography and can help to remove unwanted artifacts when your sub-frames are stacked to form a master frame. Dithering means to shift the pointing of the telescope slightly in random directions between exposures. This allows hot and cold pixels, cosmic ray artifacts, and fixed pattern noise, and even satellite or airplane trails to be removed during the stacking process.

Automatic Dithering is supported by SGPro supported or ASIAIR 

Drawback of Dithering: A long exposure broken into shorter exposures at each dither point will increase the amount of read noise in the final combined image.

External links:

• http://dslr-astrophotography.com/dithering-optimal-results-dslr-astrophotography/
• https://skyandtelescope.org/astronomy-blogs/astrophotography-jerry-lodriguss/why-how-dither-astro-images/

Created with the Personal Edition of HelpNDoc: Easily create EBooks