[rollei_list] Re: Flashbulbs

At 03:39 PM 5/31/2005, Jerry wrote:
>Don,
>
>No, The FP type bulbs were designed to be used with
>the FP shutters of the Speed Graphics which had a longer
>travel time.  They were NOT designed for modern 35mm
>FP shutters which only synchronize at 1/60 t0 1/125 sec.
>
>My old Leica IIIf used FP bulbs at higher speeds with a
>CHICO flash.
>
>Jerry
.
Jerry,
I didn't mention FP bulbs, just said I didn't remember what the designation 
was for bulbs designed for focal plane shutters.

DAW




>Don Williams wrote:
>
> > At 03:08 PM 5/31/2005, John Jensen you wrote:
> > >My vague recollection is that M is 15-20 milliseconds
> > >delay, F about 5 milliseconds, and X zero
> > >milliseconds.
> > >
> > >The purpose of the F bulbs was for a short lighting
> > >time for action shots (not as quick as an electronic
> > >flash, however).
> > >
> > >John
> > Yup, those numbers do sound right when I think back.  Now about everything
> > but the M2 bulbs I use underwater is set for X.
> >
> > My recollection is that what you refer to as "delay" was the delay allowed
> > for the bulbs, and would actually be an advance contact trigger time before
> > full shutter opening.
> >
> > What I don't recall is what designation was used for bulbs used for
> > focal-plane shutters.  Of course now most focal plane shutters can use just
> > about any bulb at 1/30 or 1/60 sec, some even shorter exposures.
> >
> > DAW
> >
> > (I'm supposed to be working today but decided to sort of unwind from the
> > past few days- I work at home anyhow)
> >
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Don Williams
La Jolla, CA



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