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Inphotography, amultipleexposure is when a single frame offilm is taken more than once. This usually happens accidentally if the photographer forgets to advance the film. To prevent multiple exposures, most moderncameras will not let thephotographer open theshutter again until the film is advanced. It can also be used on purpose forspecial effects, such as creating a fake photograph of aghost. The resultingimage will be a combination of all of the shots. Multiple exposures are not possible ondigital cameras, but the effect can be simulated with thealpha channel feature ofphoto editing software such asPhotoshop orGIMP.
