Decided to play with some long exposures a few nights ago. Some were too long and some were not long enough. It's a fine line really. Either way a tri-pod is obviously required. I need to go back and re-read the manual, but I stumbled on a setting in my 5D II where with a Bulb setting you can set automatic noise reduction. After shooting without it I can see how that would be greatly beneficial! Here are a few shots from the other night of the Perseids Meteor Shower.