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What is a Folmer Graflex gravity-type synchronizer? What is it used for? I bought one because it was in a nice wooden box. I found none on eBay and no information anywhere else.

  • Can you take and add a photograph of the device, for illustration? – xiota Aug 28 '18 at 21:57
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It tests shutter sync speeds.

http://www.radionerds.com/images/c/c3/TM_11-2378_1944.pdf page numbered 1

I doubt it has much use today.

  • OK. At least I know what it is now. Thanks for the link – John E Kendall Oct 18 '18 at 17:54
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Here's a link to the user manual for one: http://www.cameramanuals.org/prof_pdf/graflex_flash_synchronizer.pdf

  • OK. At least I know what it is now. Thanks for the link – John E Kendall Oct 18 '18 at 17:54

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