Re: Broken light bulb - pic

Allen wrote:

DeanB wrote:
On Mar 18, 1:21 pm, "acl" <achilleaslazari...@xxxxxxxxxxx> wrote:
On Mar 18, 7:10 am, "DeanB" <deanbrow...@xxxxxxxxx> wrote:

http://i18.tinypic.com/48c0kgh.jpg
This was taken on a Minolta 7000 with 50/1.4 and flash. Its a scan of
the print, not a good scan either. The bulb was shot with a pellet
gun, fixed up to trip the flash.
Excellent, thanks! Do you have any more similar shots?

Many thanks! I had one of a frosted bulb breaking in similar
circumstances, but its not quite so good. I can't find it now anyway.

Anyone know if some flashes are faster than others, and if so, which
ones? I think low-energy flashes are shorter, but not sure.

Remembering things I read when Harold Edgerton invented and was
developing what was he called "stroboscopic photography", the duration
of the flash is inversely proportional to the voltage applied to the
tube. His famous pictures such as one showing a bullet halfway through a
playing card were taken with equipment pouring tens of thousands of
volts (30K comes to mind) through the tube. Not sure now, but I recall
that his tubes were filled with xenon; I have no idea what is used now,
but all his early attempts were in BW, and I don't know what color
pictures would have looked like--perhaps monochrome. I remember pictures
of some of his equipment with power supplies that would have probably
required two strong people to lift. This is going back 60 years or so,
and different gases in the tubes might produce different results.
Allen


Hello, Allen:

Yes, indeed, Harold Edgerton was a brilliant Nebraskan, whether pun
intended...or not. <g>

On a more serious note, his powerful, airborne strobe units helped pave
the way for the 1944 Allied invasion of Normandy, France, during World
War II. They allowed aerial photographic reconnaissance of enemy
positions, at night, while the Germans suspected nothing.


Cordially,
John Turco <jtur@xxxxxxxxxxxxxx>
.

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