Over the course of the last month I've been experimenting for the first time with photographs of light trails. I've learned a few things and I've taken a LOT of photographs. Even for me. After a few tests I settled on a pretty closed aperture (F22 mostly) and a low ISO (125-200) to enable a nice slow shutter speed of 30 secs. Obviously for this long exposure photography style a tripod is essential, I also used the 2 second delay feature of my Canon in order to avoid hand-ind