Thanks. On a canon eos 550d with the 18-55 mm with around 20 minutes exposure. A wider lens is definetly a good idea for photos with a lot of sky. 18mm and an aperture around 3.5 is also not that great when you want to make a photo without the stripes of the stars. But the sky was so clean, that you could see many stars. In the mountains it's more possible, in cities you can't see this many stars with the light pollution. It's also always luck to make good photos.