I love my iPhone4, and the HDR feature is pretty awesome – for some things. Pretty much any time you are moving, or if there is a sign in the image HDR will cause some weird issues. The other thing I have found is that it gets weird in places with lots of detail, like on a trail, or whenever there is snow. Here are some of the weirdest images we got from our Glacier trip.
Information about HDR from Wikipedia.
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