[rollei_list] Re: Flashbulbs
- From: Jerry Lehrer <jerryleh@xxxxxxxxxxx>
- To: rollei_list@xxxxxxxxxxxxx
- Date: Tue, 31 May 2005 15:39:42 -0700
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
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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