Shooting 16:9 with a 4:3 Camera
If you have a Canon Ixus 80IS, like me, and you shoot video for your widescreen television at home (like me), you may want to try out this little trick.
The Canon Ixus is a 4:3 camera. The video that comes out of it is almost square shaped. When you try to make a 16:9 video, you can stretch it, or crop it. Cropping is far better, but you need some "headroom" to do that. If you made a closeup, chances are that you do not have enough room to crop to a 16:9 format.
I solved this by making this little chart, which I placed on a memorycard and put in my camera. By previewing the image on the camera's display, you know where the "16:9 limit" is. I put two pieces of half-translucent tape on the camera, so I can tell what fit's inside the 16:9 frame. I also included the other formats, like 3:2, and 2.39:1, should you want to make wide-screen theater movies :-)
Then, I load up the movie in iMovie, and it will be cropped perfectly. Suppose you missed the 16:9 frame or want to re-center your shot, you can always press the "crop" button in your project to tell iMovie which piece of the image you want.