Astrophotography differs from most other forms of photography in that not only do you need to take multiple exposures and stack them, you also need to take different types of frames / images.
Typically, multiple frame types (Lights, Darks, Flats, Bias) are loaded into a stacking software program to produce a single image that you will process in your post processing software (Lightroom, Photoshop, etc.).
These frame types are input into a stacking software program to help to reduce noise, vignetting, sensor hot spots, and camera noise patterns.
The table below explains the different exposure types, the purpose for them, and how to take them.
Astrophotography Calibration Frame Types
All of these exposure types will be loaded into your stacking software. I used Deep Sky Stacker (DSS) a free stacking software for Window that supports all of these exposure types.
Written by Martin Belan
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