Today on my lunch break I ventured out and took some pics. I saw a tree with some red berries on it that stood out from the rest of the field. I took two pictures with a fixed aperture of f/2.8. As you can see in the pictures, the focal point changed from the background in image one to the branch in image 2. My intention was for the focus to be on the branch, and not the background. Here are the images. Image One Image Two Each pic contains the EXIF data, but I'll list them here and save you some time . Image One EXIF Image Two EXIF Unless I'm missing something, it appears that only the shutter speed or Tv has changed. Is the differing shutter speed causing the change in focus, or is it my Auto-Image Auto-Focus on the camera? If it's the latter, I'm not sure how the camera decides on the focal point. As you can see in comparing the pictures, the shot angle has slightly changed, and maybe that's caused the focus to change. I dunno. Any thoughts? Thanks!