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Old May 22, 2009, 4:05 AM   #1
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Default Long Exposure - the old swinging light trick

I'll see what I can do playing in traffic later but 1st the low hanging fruit! Windowless bathroom, flashlight covered with pinholed foil, on a wire, swinging over camera.



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Old May 22, 2009, 6:33 AM   #2
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Very, very impressive. Thanks for explaining your procedure so others may try to replicate. Looking forward to more of your "artwork"!
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Old May 22, 2009, 8:02 AM   #3
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I really like the first one. It looks like something made from one of those old Etch-A-Sketch toys.
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Old May 22, 2009, 9:38 AM   #4
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Its funny you said etch-a-sketch mugmar. That was my first name for it. However, what you and I are thinking of is Spirograph. Etch-a-sketch is the little red tv like box with two knobs that control the 'cursor' that removes the magnetic powder. Ive also seen a toy which had a pen suspended over a piece of paper. The pen was then free to move in any horizontal direction like a pendulum. But enough of toys. Great shot rmuir. Particularly the first one which is amazingly clear in its construction as compared to the chaos of the second shot.
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Old May 22, 2009, 9:58 AM   #5
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You are correct Bynx, Spirograph is what I was meaning but my brain typed etch-a sketch. Oh well I guess that happens as we get older!!
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Old May 25, 2009, 8:26 PM   #6
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Fantastic photos.
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Old May 27, 2009, 10:29 PM   #7
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I'm waiting for someone to snap their fingers so I can wake up. That looks like a perfect hypnotic object. Good work with the light painting.

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Old May 28, 2009, 1:48 PM   #8
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Muir,
There's got to be a mathematical equation somewhere that describes these curves. Wonderful work.
I'm surprised how effective your techinique is. A great example of low tech solution.
Aloha
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Old May 28, 2009, 2:13 PM   #9
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Selvin, I suspect there's a whole host of equations involved, equations pertaining to pendulum movement and precession, geometric equations pertaining to the slicing of a cone by a flat surface, etc. It boggles my mind to think about it although I used to be pretty good at plain and solid geometry.

Oh! I think there are some trig and calculus involved, too.

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Old May 28, 2009, 3:41 PM   #10
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Thanks everyone, trying this has been on my to-do list a long time - since reading about it somewhere. These challenges are great motivators to just do it, whatever it is.

I'd like to have seen how #1 played out past my cameras 15 sec. limit.
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