I've been trying astronomical photography for a while everything am doing is failing XD, Can I ask some question? Whats the point in shooting raw images? and if your using bulb shots how do you control the lighting as you want? my problem is that my 40D shoots only 30 seconds max then bulb mode when i use bulb mode the lighting is purely awful the sky is somehow light blue gray, the stars are barley visible the moon produces flare...never thought moon light could produce flare?? XD One last thing..any tips to avoid light pollution? am not a professional and I cannot drive, me getting out of the city to shoot is not a typical teenager. and I cannot go anywhere..any other ways?