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		Damn. Sorry I forgot to vote. I've been a bit busy recently and it just came and went so fast.
 
 So did anyone want to have a guess how it was done before I explain it?
 
 
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		3 shot using 3 positions on the zoom lens and multi-exposure with your fancy flash. 
 
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		Nope. 
 
 Well the flash bit was correct. :)
 
 
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		Did you cheat and use layer stacking to merge 3 images?
 
 OK, you'd better en-"lighten" us?
 
 
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		You were close. 
 
 I set the shutter speed to 4sec exposure with a medium aperture, the flash to a 1Hz strobe at 1/16 power and then rolled diagonally backwards on a wheeled desk chair while holding the flash test button.
 
 
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		I was going to say strobe flash but thought it  wouldn't have given enough time.  You must be quick on that chair;)