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PostPosted: Sat Aug 20, 2011 3:25 pm 
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I'm after something that will trigger a flash on movement. For example, if a light beam is broken. Not sure what they're called so I've had some search fail so far only turning up one expensive unit on ebay. The common cheap sound sensitive ones aren't appropriate for my application, although at worst I could modify one myself. Any suggestions?

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PostPosted: Sat Aug 20, 2011 11:58 pm 
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No , but I would be interested in the result.

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PostPosted: Sun Aug 21, 2011 12:53 am 
Magic Lantern has movement sensor options

And its free


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PostPosted: Sun Aug 21, 2011 8:26 am 
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Magic Lantern is totally the wrong application. I'm looking for something stand alone to trigger an external flash.

For example, here is one such unit on ebay, of which there are some more like it but they're all pretty expensive. For sound only, there's this one which is a lot cheaper. Was kinda hoping there's a light sensing one which was cheaper too...

I've got the electronics know how to build my own, but not the time! As a middle ground I've been thinking about getting the cheap sound one and modifying it myself which is a smaller job than building one ground up.

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Canon DSLRs: 7D, 5D2, 1D, 600D, 450D full spectrum, 300D IR mod
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3rd party: Zeiss 2/50 makro, Samyang 8mm fisheye, Sigma 150 macro, 120-300 f/2.8 OS, Celestron 1325/13
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PostPosted: Sun Aug 21, 2011 8:38 am 
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The one listed on e-bay is also listed e-bay here as coming from Greece. Maybe send an e-mail and see if something can be build?

http://www.ebay.com.au/itm/Micro-Sound- ... 2a134b5b97

have a look at Stopshot
http://www.cognisys-inc.com/stopshot/stopshot.php


while googling came across this.
Worth a look
http://www.wired.com/wiredscience/2010/ ... ewall=true

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PostPosted: Sun Aug 21, 2011 9:01 am 
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I got a feeling I need to adjust my value expectations here :D I like the article, but "hundreds of dollars" was proposed as the cheaper end and I'm looking to get an order of magnitude below that...

I'd have no hesitation on buying a more expensive unit if I know I'd use it more often, but my application here is more one off so I'm hesitant to do so...

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Canon DSLRs: 7D, 5D2, 1D, 600D, 450D full spectrum, 300D IR mod
Lenses: EF 35/2, 50/1.8, 85/1.8, 135/2+SF, 28-80 V, 70-300L, 100-400L, TS-E 24/3.5L, MP-E 65, EF-S 15-85 IS
3rd party: Zeiss 2/50 makro, Samyang 8mm fisheye, Sigma 150 macro, 120-300 f/2.8 OS, Celestron 1325/13
Tinies: Sony HX9V.


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