Double Exposure
This is one the children have a lot of fun with. With it you can turn your only child or friends, parents and children into twins. Or have that large family you always wanted. Invent jokes on the spot.
It is a very easy filter to use. You must make sure your cameras can take multiple exposures first.
This special effect filter allows you to expose each half of one piece of film separately. One half of this attachment is completely black and blocks all light transmission while the other half is transparent. With the first exposure, one half of the image remains unexposed. Then, by rotating the attachment in its holder 180 degrees and using the multiple exposure feature on your camera, a second exposure is made on the unexposed half of the film. This filter measures 85 x 85mm and fits the Cokin P series holder.
Helpful Hints:
Do not forget to set your camera to Double exposure mode
An aperture setting of f/8 through to f/4 is good for wide angle lenses and f/22 through to f/8 for telephoto lenses. The lighting must be the same for both shots and a tripod is required for best results.