© Paul’s Astrophotography 2020
Calibration frames remove and clean up certain artefacts from your stacked images. Lights: These are the “normal” exposures of your target Darks: remove thermal noise Flats: remove vignetting and dust bunnies on the lens/filter/sensor. Bias frames remove read out noise These exposures need to be added to your stacking programme along with your light frames
© Paul’s Astrophotography 2020 Dark Frames Flat Frames Bias Frames
Dark Calibration Frames Cover the front of the telescope/lens with the cap Dark frames are the same exposure length as your main images Same ISO setting as the light frames Same temperature as light frames Usually take as many darks as lights Don’t need to be taken every session - you can create dark libraries and reuse.
Galaxies Nebulae Narrowband Solar System Stars