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Model 250 HV

 
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frohnec



Joined: 12 May 2004
Posts: 57
Location: Virginia

PostPosted: Tue Mar 14, 2006 5:01 pm    Post subject: Reply with quote

Graflex electronic flash can that be used with the Ektar 135mm sychronize (x) flash withour a solenoid?
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tsgrimm



Joined: 04 Apr 2004
Posts: 158
Location: SE Michigan

PostPosted: Wed Mar 15, 2006 11:52 pm    Post subject: Reply with quote

It will work at any shutter speed with any leaf shuttered camera that has X sync, all 35mm focal plane shuttered cameras (see camera manual for X sync speed) and at any shutter speed for some digital cameras (maybe all if you get a slave that recognizes the preflash).

I am not familiar with the Graphic focal plane shutter.

[ This Message was edited by: tsgrimm on 2006-03-15 15:55 ]
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disemjg



Joined: 10 Jan 2002
Posts: 469
Location: Washington, DC

PostPosted: Thu Mar 16, 2006 9:19 pm    Post subject: Reply with quote

"...and at any shutter speed for some digital cameras (maybe all if you get a slave that recognizes the preflash)."

Be aware that most older electronic flashes have synch circut voltage levels that can kill modern electronic cameras. Before using such a unit, check the voltage.

I believe the currently accepted standard for modern cameras is a 6V circut value. A while back I tested my Vivitar 283 and found that its trigger circuit was 65 volts. I have heard of Vivitar 283's that were claimed to have 300v trigger circuits.

Devices are available to clip the synch voltage to a safe level; the Wein Safe-Synch comes to mind as I use them on my old Speedotron Brownline packs. So you can use the old flash units if you have such a device, but check the voltage level to be sure it is really safe.
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C. Henry



Joined: 13 Dec 2005
Posts: 356
Location: North East Georgia, USA

PostPosted: Thu Mar 16, 2006 9:49 pm    Post subject: Reply with quote

IIRC the 300 volt sync circut was on the Vivitar 285 not the 283. I never have used either of these units because of several reasons including the high trigger circut voltages .

C. Henry
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