The photo stich tool has been packaged with Canon DSLR's for years. It allows you to stitch images together to create a panorama. In its simplest form, you can place your camera on a tripod, rotate it and take overlapping images. Then use the software to join them. This is not ideal, but it works.
There are lots of tools, special heads, etc online, try it out in its simple form to see if you like it before buying the expensive tools.