Nikon D300 User Manual page 230

Figure 3-56. Two sample multiple exposures
My Recommendation: Multiple exposure images can be a
lot of fun to create (see Figure 3-56). I often shoot Multiple
exposure images with two people in the frame. One person
leaves after the first half of the exposure is taken, while the
other stays carefully still. When finished, you will have a
normal picture of one person and the background, but the
person that left halfway through the Multiple exposure will be
ghosted. That means you'll be able to see the background
right through her. It's even more fun if you have the person
that leaves touch the other person during the first half of the
Multiple exposure. Maybe have her put a hand on the other
person's shoulder or wrap her arms around him.
If the person that stays for the entire exposure is very careful
not to move at all, they will remain sharp, and the image will
certainly raise eyebrows later.
You can also do this with just one person, as the second
picture in Figure 3-56 shows. Just make sure they leave
halfway through the Multiple exposure.
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