Shoot multiple frames and stitch them together using panorama software. Shoot multiple frames of your soon-to-be-panorama, overlapping the edges of each image by at least 25%. Many wide angle lenses display some distortion at the edges of the frame; this is easily seen when a straight line is placed on the sides of the frame and is bent or bowed. Make sure the lens you are using either doesn't have any distortion (not a fisheye for a fixed focal length lens) or is zoomed in enough to eliminate any distortion on a telephoto lens.
