Fig. 14: Composite image of comet C/2020 F3 Neowise. 10 exposures at ISO 1600 for 4 seconds with Nikon D850 and Nikkor 300mm 2.8D at f/4. 4 dark frames. 1 flat frame. Guided with Vixen GP-DX mount. Unfortunately the faint ion tail is not visible. It was taken at dusk and later that night there were thin clouds coming. 13 July 2020, Bözberg. Nikon D850; Δt=4 s; f=300 mm; f/4.0; ISO 1600; 12 July 2020 23:13:06
