Nikon DSLR for astro - D800 D5500 D7100 compared

In my last video I told the story of a night shoot at Durdle Door to capture the Milky Way. In this video I look at whether the Nikon D5500 is up to the job and explain why I will be swapping it out for a D7100 as the backup to my main D800. I take look at: Camera features Low light performance Camera controls Value for money