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		dmyhand1957
 
 
  Joined: 02 Feb 2008 Posts: 5 Location: Texas
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				 Posted: Tue Feb 05, 2008 3:24 am    Post subject: What is the purpose of the solenoid? | 
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				Hi:
 
 
I just bought a really nice Crown Graphic on eBay that had a couple of rollfilm backs.  Everything works very nicely.  I have a question.  What is the purpose of the solenoid attached to the shutter?  Thanks, Dennis | 
			 
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		RichS
 
 
  Joined: 18 Oct 2001 Posts: 1468 Location: South of Rochester, NY
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				 Posted: Tue Feb 05, 2008 6:32 am    Post subject:  | 
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				With the flash bulb handle attached and the proper cables, you can push the button on the flash and the solenoid fires (and syncs) the shutter. It was a great idea at the time and still useful for an electric release, or syncing with bulbs. _________________ ----------------------------------------
 
"Ya just can't have too many GVIIs"  
 
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		Les
 
 
  Joined: 09 May 2001 Posts: 2682 Location: Detroit, MI
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				 Posted: Wed Feb 06, 2008 3:40 am    Post subject:  | 
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				1. If the lens doesn't have any flash connections, then it synchronizes the shutter with the flash bulb (no electronic synchronization possible)
 
 
or 
 
 
2.  If there is a sync connection on the lens then it's an easy way to trip the shutter from the battery case of the flash gun. _________________ "In order to invent, you need a good imagination and a lot of junk" Thomas Edison | 
			 
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