I need some help. Last night I was trying to take some photo's of the Northern Lights here in Alaska. Well every picture I took had camera shake. I was using my tripod (Manfrotto 055XPROB) and head (Manfrotto 488RC0 Midi Ball Head). I don't have a remote switch so I set my self timer and then stepped away from the camera. I had my aperture set at 3.5 with a 30 second exposure, ISO was 100, and there was no wind. Also I was using my 28-135 IS len set to 28mm. Focus was set on infinity, and the IS was turned off. Can someone help me with why all my pictures had a little shake in them?