Archived posting to the Leica Users Group, 2010/07/24

[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]

Subject: [Leica] Flashbulbs + M8
From: photo.forrest at earthlink.net (Philip Forrest)
Date: Sat, 24 Jul 2010 16:11:07 -0400
References: <B7B5EBB3-4C27-4028-A116-170DFC8A12BE@btinternet.com> <642208387.2593561279916555918.JavaMail.root@dsmdc-mail-mbs12> <20100723164129.6b649615@linux-0ifi.site> <AANLkTimPXtj2VTlT9OpwUnbzMCe4VGPwu0uS_0DUO1Yc@mail.gmail.com> <20100723182413.6669b429@linux-0ifi.site> <p06230920c870eb2d3bb7@[192.168.1.22]>

Using front curtain flash and a shutter speed not higher than 1/30 will
allow the 20 millisecond bulbs to reach peak luminance during the
exposure.

Phil Forrest


On Sat, 24 Jul 2010 12:13:16 -0700
Henning Wulff <henningw at archiphoto.com> wrote:

> How are you going to sync the bulbs? The built in sync will fire the 
> bulbs too late.
> 
> The sync current for most bulb flash guns is tiny; but the timing
> won't work.
> 
> 
> At 6:24 PM -0400 7/23/10, Philip Forrest wrote:
> >I already own the M8, so most of the expense is right there.
> >Flashbulbs can be had cheaply around here at yardsales, thriftstores
> >and sometimes online.
> >I don't want full visible spectrum + IR. I just want above 700nm
> >which, with ISO 160 would force me to use a tripod and expose for
> >several seconds unless I blast it with a powerful flash.
> >
> >The flashbulbs emit a LOT of IR and with the 720nm filter, the
> >attenuation of that end of the spectrum is great so it brings out the
> >foreground a lot and can effectively black out the background, even
> >during the daytime. This way, I shoot at 1/30 sec and use GN for my
> >apertures.
> >
> >Buying another camera and having it modified is not really the
> >solution I'm looking for, nor can afford.
> >
> >Phil Forrest
> >
> >
> >On Fri, 23 Jul 2010 15:07:32 -0700
> >Richard Man <richard at imagecraft.com> wrote:
> >
> >>  Hmm... may be cheaper and easier to convert a u4/3 camera to full
> >>  time IR and then use a Leica->u4/3 adapter? You get full exposure
> >>  without the filter in the front and with the EVF, you get dead on
> >>  focusing without errors.
> >>
> >>
> >>  On Fri, Jul 23, 2010 at 1:41 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
> 



Replies: Reply from henningw at archiphoto.com (Henning Wulff) ([Leica] Flashbulbs + M8)
Reply from sonc.hegr at gmail.com (Sonny Carter) ([Leica] Flashbulbs + M8)
In reply to: Message from topoxforddoc at btinternet.com (Charlie Chan) ([Leica] battery for DMR?)
Message from grduprey at mchsi.com (grduprey at mchsi.com) ([Leica] battery for DMR?)
Message from photo.forrest at earthlink.net (Philip Forrest) ([Leica] Flashbulbs + M8)
Message from richard at imagecraft.com (Richard Man) ([Leica] Flashbulbs + M8)
Message from photo.forrest at earthlink.net (Philip Forrest) ([Leica] Flashbulbs + M8)
Message from henningw at archiphoto.com (Henning Wulff) ([Leica] Flashbulbs + M8)