Hello, I'm just starting out and getting use my Minolta Dynax 5D, could someone please explain to me why I keep getting a 'light' spot on the upper left hand corner when I try and take star trails? I cant for the life of me figure what I'm doing wrong. I've had the camera for about two years, but due to work I'm only now trying to learn all the features and photography itself. Any help will be greatly appreciated. Thanks night_vision A screen shot of the properties. http://databytes.org//node1/prop.png And the photo unedited only resized.