im so in love with these!!! can someone explain to me how they are done?
Lot of steps that can be used or not. What I do most of the time:
1. Mount camera on tripod and insure that it is level.
2. Decide where the beginning and end of the area I want is and then take a meter reading from the middle area of the pano.
3. Set that reading in manual mode on the camera. This makes sure that the aperature / shutter speed / white balance is consistent from end to end of the picture. For instance, if you start at one end in bright sun and end up in the shade, sometimes the images will change so much that you will have to do a lot of post processing to get a decent end result.
4. Start at one end and take as many shots as necessary to get about a 1/3 frame overlap on the preceding shot.
5. Stitch together in pano software. In most current software you can set the value of the cameral lens and it will automatically correct for lens distortion. In most software you can also correct for any distortion of images that may occur by way of tilting the picture a little bit, picking out several objects in one picture and aligning them with the same objects in the next image, etc..
6. Once that is all done, then crop the image to get rid of the rough edges from the stitching and you are done unless you want to do further post processing of the resulting image.
You can do these handheld also but you have to insure that you keep a fairly level camera line while you shoot the images. Software is so good now days that it is possible to get great panos without a tripod if the light is good and the subject has a lot of "compare and lineup points" for it to combine the images.
Just my way of doing it. A link to a good "how-to":
http://www.panoguide.com/howto/panoramas/shooting.jsp