[_Microft]

Since it is this time of the year again, here is an idea: try bouncing the view of the screen off of a metallized glass Christmas bauble for a makeshift curved mirror.

Edit: an iPhone fails to focus on the reflections in a Christmas bauble, maybe the warped reflection throws something off in the auto-focus method.

Edit 2: it works with a larger bauble, supposedly because the view is not as warped as in a small one that has a smaller radius of curvature.