As someone who does astrophotography, the EXIF data is very important. If I see an image of a DSO that I want to try for, I can look at the data (most also post their settings and processing info) and see if I can aim for the same settings or use them as a beginning. I may not be able to recreate the exact same image, but with the data, I have a partial chance on at least getting something workable to process. :-) -Christine