I took a star trail shot while camping last week. I've done them before, but this time decided to try an image stack instead. This is over about 5 hours, camera was set to ISO3200 (so still a little grainy) and 30s exposures. Bit of tidying up to get rid of some power lines, but this is pretty much what I ended up with. The stars were so damn bright that I actually had to try and tone down the trails a bit.
![Image](https://farm2.staticflickr.com/1668/24175782492_ce70e98379_n.jpg)
a quickr pickr post