Astrophotography is about as niche a market as you can find in photography. Though composed mainly of astronomy enthusiasts, astrophotography may have some sales potential. After all, there are few things as striking as distant galaxies and nebulas to hang on the wall in large format. However, astrophotography for sale in the printing market is relatively untested and making the images is a complex, time-consuming process. Moreover, the approach to astrophotography is somewhat counterintuitive when compared to typical studio and daylight photography. “When you make a print, the quality of the print is going to have a direct relationship to the signal-to-noise ratio in the image. If you try to print something with a low signal-to-noise ratio it will look awful. People think when you raise the ISO it makes the image noisier; it doesn’t. The noise is the same. In fact, with digital cameras, and DSLRs specifically, the noise actually goes down when you raise the ISO. The trouble is...