Mosaics
Sometimes, imaging the very big is more impressive than the very small
It is not uncommon for non-astronomers to believe that astrophotography requires a long telescope with considerable magnification and it is quite a shock when they realize just how big some deep-sky objects really are. Even then, astronomers are sometimes dismayed when their shiny new telescope has insufficient field of view to capture the entirety of a large galaxy or nebula. At the extremes, the shortest viable telescope focal lengths are around 350 mm and even with a full-frame sensor, may be too narrow to capture the largest views. In these circumstances most astronomers are aware of mosaics, where side by side image tiles are seamlessly joined to extend ...
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