Tonight I took a few photos of the night sky. That was my first time when I had done pictures of stars at night sky. I used a simple DSLR camera, standard lens 18-55mm and a tripod. I tried ISO-800 and then ISO-400.
I realised that a focal length 18mm and exposure time up to 30sec keep all stars “frozen”. Longer focal length makes this time shorter. Also the closer to the horizon angular velocity of stars is greater and exposure time should be shorter.
NIKON D3100 (18mm, f/3.5, 30.6 sec, ISO800)
NIKON D3100 (20mm, f/3.8, 18.7 sec, ISO800)
NIKON D3100 (20mm, f/3.8, 4.7 sec, ISO800)
NIKON D3100 (20mm, f/3.8, 30.9 sec, ISO800)
NIKON D3100 (20mm, f/3.8, 106.9 sec, ISO800)
NIKON D3100 (20mm, f/3.8, 120.6 sec, ISO400)
NIKON D3100 (20mm, f/3.8, 234.7 sec, ISO400)
NIKON D3100 (55mm, f/5.6, 7.9 sec, ISO400)
NIKON D3100 (55mm, f/5.6, 4.8 sec, ISO400)
NIKON D3100 (55mm, f/5.6, 27.9 sec, ISO400)
NIKON D3100 (18mm, f/3.5, 59 sec, ISO400)