Photographing fall foliage using HDR techniques can be quite challenging.
Hundreds to thousands of tiny leaves and branches dance and move in even the slightest of breezes. Using a small aperture for maximum depth of field means using slow shutter speeds, potentially causing blur and additional leaf and branch movement.
Combining these multiple exposures – even with the best of ghost reduction in your favorite HDR program – can often cause errors and problems that can sometimes be seen even without zooming in. Sometimes these effects can be minimized by maxing out the ghost reduction, although at the expense of increased halo’s.