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Archive 2012 · problems with multiple exposure 1dx or 5DIII

  
 
albuht813
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p.1 #1 · problems with multiple exposure 1dx or 5DIII


I'm really stoked about my new 1Dx that I've been toying with for the past 3 weeks. It's really an amazing camera.

I'm going through the manual and looking at the online tutorials and came across the multiple exposure function. My question is this: why is the layered subject always so transparent on the final image created?? Even on the continuous modes, the object moving across the frame looks like a ghost. Anybody really good at this function that can teach me how this is done? The look I'm trying to achieve now is to getting multiple copies of a person on different areas of the frame so it gives that "multiplicity" effect.

Any comments are helpful and please post your photos if you have them. thanks in advance.



Nov 01, 2012 at 04:44 PM
Sheldon N
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p.1 #2 · problems with multiple exposure 1dx or 5DIII


It looks a lot like what you get if you use the "Lighten" layer blending mode in photoshop with multiple layers.

You'll get the best results with a fixed camera position, a dark background, and a well illuminated subject that doesn't overlap itself in each frame.



Nov 01, 2012 at 04:49 PM
Monito
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p.1 #3 · problems with multiple exposure 1dx or 5DIII


The ghosting is because accumulating light is additive. To avoid ghosting, expose against a very dark background and have little or no overlap between the subject as they transition through the positions, as SheldonN writes. That way you can expose each of the component images at full exposure. Otherwise you have to use less exposure to avoid blowing out the combination.

In camera multiple exposure is rarely necessary and rarely as effective as combining multiple exposures in post-processing.

A main use of in-camera multiple exposure is to make a long exposure (say 60 seconds) out of shorter exposures (say 5 at 12 seconds each) so that noise does not correlate from image to image. The resulting image is less noisy. Astrophotographers do this routinely.



Nov 01, 2012 at 05:30 PM





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