CAMERA/LENS TECHNIQUE / DROP FOCUS TECHNIQUE

In this photograph I have used focal stacking, or the DROP FOCUS technique. This is when you employ a shallow depth of field, (f.5.6 in this case), but change your focal point to an area of the image, which may be in the center or other, which you want in sharp focus. The focal length extends to both sides of the point of focus, so here we see blurring in the foreground and to the rear of the focal point.

http://books.google.com/books?id=wORdQVpE4wAC&pg=PA118&lpg=PA118&dq=drop+focus+technique+photography&source=bl&ot

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