I understand what apeture is and what shutter speed, but what I don't understand is how, why and when I need to synchronize the two. I do manually adjudt my shutter speed, but have never done anything with the apeture. I lost my cameras manual quite awhile ago. Another question I have- I remember my manual have instructions on how to blur the edges of an image to make it look like it had a dream like quality. Can somebody tell me what setting I need to use to accomplish this?