This video tutorial will help you visualize the process of taking flat frames. How to take Flat Frames for Astrophotography This technique is affectionately known to the DSLR astrophotography community as, “the white t-shirt method”. The method I have described for taking flats on this page is most useful for those shooting with a DSLR camera such as the Canon EOS Rebel T3i I currently own. Like many aspects of deep-sky astrophotography, your method of taking flat frames will vary depending on the equipment you use. The uneven field illumination and vignetting in my deep sky images were a real pain to correct in post-processing. Now, I know that flat frames are as important as taking dark frames. This is often a question I get from beginners that are just getting started in deep-sky astrophotography.Įarly on, I was guilty of skipping calibration frames such as flats and bias frames. Once you know what to look for, taking successful “flats” is easy with a DSLR, dedicated astronomy camera, or even a CCD camera.
Learning how to take flat frames is an essential step for any deep-sky astrophotography enthusiast.
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