There is a way to get a very wide view and it doesn't cost much. Get a convex mirror (like security mirror, but stronger curve) and point camera at the mirror. You are taking pictures of the reflection (might have to experiment with the focus) The only catch is that the camera will show in the reflection. You actually want the camera lens to be more like a tele (zoomed in) so it can be farther from the mirror (be smaller in the relfection) One trick is to have camera in the shade of a tree or something so you don't notice it. Get a mirror at least 1 foot diameter with strong curve. Have the camera at least 2 feet from mirror. Keep in mind the relfection is not as bright as the sky, so needs a bit more exposure. You could set mirror facing straight up, with camera above it (centered) for all sky shot, or offset mirror and camera for less than perfect (but easier) shot. I got this idea when doing night work of "star trails" and aurora. A lens capable of doing such a wide view is very expensive, so I thought of the mirror technique. Never actually got the mirror, so I would be very interested if you try this.