Just ventured into this area after doing research on the web etc. Right now, I'm concentrating on night or very low light sky trying to capture lots of stars as well as some foreground or midground scenery such as mountains. However, the Images I've taken appear not to be as "full of stars" nor exposed enough. Here's my set up:
Focal length (kit lens) 18mm
Shutter Speed - varies from 20sec to 1.5minutes
ISO max 1600
Lens in manual
Vibration reduction off
Long exposure NR on
Ml l3 remote shutter release
I note when I do get a 'decent' image, say of dawns early light over a village with some lights on, that the points of lights appear to be out of focus. I've tried to set up my manual focus during the day by using a distant object then leaving that focus set when I shoot at night. As there is no infinity mark, it becomes a bit of a guess.
I may be getting too much spurious light intrusion even though I'm in AZ in a town with a supposed "dark sky" ordinance.
I would be grateful for any input the on the subject, or the sharing of your success with the D5200.
Thanks in advance.