A benefit/disadvantage of film cameras is the ability to have really longgggggggg exposures.
Benefit? No worries about batteries (depends on camera model) and you can ignore digital noise artefacts because you don't get any.
Disadvantage? The
light making the image is truly cumulative over the entire frame so if you are going for really long exposures, you need;
a) REALLY dark skies (you had some clouds by the look of it as well as some ambient sky
light)
b) A really steady
tripod (looks ok on your shot)
c) Dry air or some method to keep dew off the front
lens element (Again, yours looks ok)
If you have really long exposures with decent max
aperture and reasonably fast film, many of the dark areas tend to block up with star trails. Your image is starting to get into that territory. So you need to weigh up the various factors there and make choices to get the type of image you are after.
Then there is the scanning portion which can present it's own challenges, particulalry if you are like me and have no negative scanner and a very basic ability to scan prints .... Still praying a cheap coolscan 9000 on ebay - will be a long wait I fear.
Grain is supposed to be there - it's film - embrace it and love it !!!
Where did the "noise" come from - is it on your prints? Is it on your negs? How did you get the image onto AP? Neg or print scan?