Just wondering what are the best settings for getting a good clear pic of the stars? I was playing around last night (finally got a tripod for the Canon YAY ) but I'm getting some movement on the stars (star trails i think) which i don't actually want. I was using ISO200, F5.6 at about 175mm (75-300mm Zooms lens) and a 30 sec exposure - thinking the long exposure would make them clearer but obviously as i mentioned I'm getting some movement in the stars so I gather thats too long or is it also cause of using the zoom as well? So i thought I'd ask here what others find the best settings for a nice clear shot are. Thanks.