[rollei_list] Re: Flashbulbs
- From: Jerry Lehrer <jerryleh@xxxxxxxxxxx>
- To: rollei_list@xxxxxxxxxxxxx
- Date: Tue, 31 May 2005 13:46:55 -0700
Richard,
Didn't Link use scads of those #50 bulbs to take those night pictures
of steam locomotives in action?
Jerry
Richard Knoppow wrote:
> ----- Original Message -----
> From: "Jerry Lehrer" <jerryleh@xxxxxxxxxxx>
> To: <rollei_list@xxxxxxxxxxxxx>
> Sent: Tuesday, May 31, 2005 10:40 AM
> Subject: [rollei_list] Re: Flashbulbs
>
> > Richard and Peter,
> >
> > I just dug out my GE book "Photolamp & Lighting Data"
> > printed in 1963, which shows all the GE flashbulbs of that
> > era. There WERE M2s, M3s, and M5s (which bore no
> > relation to #5. The M bulbs all had a miniature pinless
> > base.
> >
> > They showed the #50 bulb which produced 5 million lumens
> > in a Edison screw base.
> >
> > Jerry
> >
> The GE No.50 and Sylvania No.3 were meant to be used in
> studio reflectors with very slow shutter speeds (1/25th or
> longer) or open flash. A single bulb in a 12" reflector has
> a guide number of 600 for ISO-100 film. Thats f/6 at 100
> feet folks, try that with your stobe units. Remember, these
> are bulbs about the size of 150 Watt household lamp.
>
> ---
> Richard Knoppow
> Los Angeles, CA, USA
> dickburk@xxxxxxxxxxxxx
>
> ---
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