Astrophotography, part 2

Yesterday I took two more 5-minute-exposure shots with iTelescope's T3 telescope (see this post for more info). These images are unedited as well, except for some minor contrast and saturation tweaks, just to make the details a bit more obvious. I still have no idea how to really edit them, since I have some problems with my operating systems and do not wish to install Photoshop just yet, which seems like a great program for post-processing. Well, however, here are the photos:

Messier 57, or Ring Nebula, in constellation Lyra

Messier 27, or Dumbbell Nebula, in constellation Vulpecula