Hi, I have recently taken up photography as a serious hobby and have been taking my photos during daylight hours or with a flash. I am off to Las Vegas next month and wanted to experiment with taking photos at night. I want to take some photos in Vegas itself and also wanted to take some pictures in the desert, I hope to get some star trails. I have a Canon 5D MKII and have a range of lenses so I think I have the right equipment. What type of lenses do you think will be best for Vegas all lit up and what do you think would be best for star trails in the desert? Also, can anyone recomend any tried and tested settings that I should be using. I had a little practise on star trails this weekend and they didn't come out at all well! Thanks.