cinematography Special Effects - Multiple Exposures

Hello Creative Fellows!

I'm hoping you can help me out on this one. I love early cinema, which often inspires me to challenge myself, and at the moment, I'm captivated by special effects accomplished in camera. I'd love to know how to make multiple exposures on the same strip of film and have the images turn out properly exposed. Does anyone know how to achieve this marvelous effect? Your advice is greatly appreciated!

- Holly

sunrise_double+exposure.jpg
 
On film, you shoot the foreground (prevalent) image first with a somewhat long shutter in full manual mode. You have to balance the light for the shutter speed that you will be using (ex. 1/125). Then, reset the film to double expose without letting light in (I have an old Minolta that I modified to reset the shutter without advancing the film) and set your shutter speed much faster (ex. 1/1000) and snap the background (ghost) image. I have a picture of Kirk Hammet that I double exposed at a Metallica concert. In the picture, it looks like he's having a guitar battle with himself. It should go without saying, but I'll say it anyway, use a tripod and lock in the camera position. Use a remote shutter release if possible.
 
For 16mm the process is essentially the same. You need to be able to rewind the film in camera or have a completely dark place and an adept touch to reset the roll/magazine. The tricky part is getting the movements of the actors to line up.
 
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