I decided to do a long exposure night picture last night. I was hoping to create a streaking light when a car drove by - I was lucky I got two of them during the exposure. I wanted to get a large field in focus so I set the Aperture to F22 - that dictated a 25 second exposure at ISO 4000. I had my 17mm-40mm F4 L lens on my Canon 5D Mark 3 - it was set to 40mm. There is very little work done in post (re-frame the picture and lens correction)
I really like these types of pictures and need to do - it is fun to see what gets created.