In dreams, cameras usually represent yourself. The vision obtained through the lens is probably more impartial than the vision obtained through the eye. So dreaming that you photograph something or someone probably indicates a desire to see that thing or person in a more objective and less emotional way than you would in real life. It represents your desire to better focus on a particular person or situation. If the camera does not work well or when developing the picture the image is not clear maybe you are avoiding an issue in real life. It can also refer to your desire to revive the past and keep it forever.