46p 20181212 0000 adyer

This is with the 106mm aperture Astro-Physics Traveler for a field roughly 3.3 x 2.2 degrees at f/5.8 with the 6x7 field flattener. This is a stack of 2 x 4-minute exposures aligned on the stars and 2 x 1-minute exposures aligned on the comet for the starlike core. All with the Canon 6D MkII at ISO 1600. 

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