Archived posting to the Leica Users Group, 2010/07/23
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Yes, the voltage is set by the batteries. Modern flashes have high voltages & low amps due to the capacitors that fire the strobe lamps. The flashbulbs don't have capacitors, have lower voltages, but higher current. The amp rating of the CEYOO and other flashbulb units isn't published anywhere so individual testing is needed with brand new batteries to give a maximum amp measurement. Leica NJ knew what my concern was, but they didn't have an answer on the CEYOO flashbulb unit. If I can get them a measurement of amps, then they can tell me what the upper threshold of current rating is for the M8 so I don't fry the camera. Stay dry during the next few days, Sonny! Phil Forrest On Fri, 23 Jul 2010 15:49:48 -0500 Sonny Carter <sonc.hegr at gmail.com> wrote: > Phil, I think flash bulbs are ignited by the current from the battery > in the gun. There's no circuitry, more than on and off. So if the > flash has 9 volt batteries, say, that's the voltage going through the > switch. > > The flash bulb is expended by the voltage passing through the > filament. > > > On Fri, Jul 23, 2010 at 3:41 PM, Philip Forrest > <photo.forrest at earthlink.net > > wrote: > > > I'm wanting to use flashbulbs with the M8 to shoot IR photos using > > my 720nm opaque filter. The flashbulbs put out much more light and > > further, much more IR than my strobes. This will allow me to shoot > > IR handheld at 160 ISO, illuminating the subject and depending > > upon background distance, leaving the background completely dark. > > Effectively, turning day into night. > > > > The question I have is if the current of the flashbulb unit could > > harm the M8. I called Leica NJ and they said they had no idea (after > > researching the question for 3 days) how the current from the CEYOO > > would affect the M8 since they do not have any data regarding > > current in that flashbulb unit. > > > > Optimally, I'd like to use a CEYOO but for now and for scenes > > needing a bit more light, I'm using a Graflex Graflite with #5 & > > #25 bulbs synched with a pocket wizard. This is a clumsy and very > > large setup though. > > > > My question is: can anyone out there measure the current from a > > CEYOO when a flashbulb is triggered? > > > > Thanks all! > > Phil Forrest > > > > _______________________________________________ > > Leica Users Group. > > See http://leica-users.org/mailman/listinfo/lug for more information > > > > >