Archived posting to the Leica Users Group, 2010/07/23
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]I only have a CHICO, but it takes an oddball 22.5 battery that I doubt I'll find anywhere, now that Radio Shack has become the Shack. What kind of battery does the CEYOO use? On Fri, Jul 23, 2010 at 4:02 PM, Philip Forrest <photo.forrest at earthlink.net > wrote: > 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 > > > > > > > > > > > > _______________________________________________ > Leica Users Group. > See http://leica-users.org/mailman/listinfo/lug for more information > -- Regards, Sonny http://www.sonc.com http://sonc.stumbleupon.com/ Natchitoches, Louisiana USA