Fabulous Water Drop Photography [PICS]

I wonder how they must have shot it !!

http://www.nachofoto.com/foto?i=41298f4b1758

According to :
I wonder how they must have shot it !!

http://www.nachofoto.com/foto?i=41298f4b1758

Well ... I've seen how Dr. Edgerton re-shot his famous milk-drop
photo in color at MIT (the original was in B&W).

1) A thin film of milk on a colored glass plate (in a Petri dish).

2) A steady source of milk drops from a pipette on a stand.

3) A sensor to trigger on the next milk drop above the one which
is about to hit the milk.

4) A low-intensity strobe pointed away from the subject.

5) A photo sensor in the path of that strobe which triggered the
high-intensity one actually taking the photo.

6) Fine tuning of the timing was accomplished by moving the photo
sensor in (5) above to let the speed of light make very small
adjustments to the timing

7) Polaroid film in a 4x5 camera to verify the timing, and then
substitute a color film of choice.

Enjoy,
DoN.
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6) Fine tuning of the timing was accomplished by moving the photo
sensor in (5) above to let the speed of light make very small
adjustments to the timing


I don't think so. Do the math.

It is alleged that claimed:

I wonder how they must have shot it !!

http://www.nachofoto.com/foto?i=41298f4b1758

A high speed camera on continuous shooting, then save the best image.

--
Jeffrey Kaplan www.gordol.org
The from userid is killfiled Send personal mail to gordol

"I always wondered about the exhortation to "Put litter in its place!".
The place for litter is on the ground, otherwise it wouldn't be
litter." - seen on usenet

According to policy_wonk :
6) Fine tuning of the timing was accomplished by moving the photo
sensor in (5) above to let the speed of light make very small
adjustments to the timing


I don't think so. Do the math.

I know what I saw there (and what he described). I was standing
right beside him, with one other person there, late at night in his
labs.

Those were *very* small tweaks to the timing.

Enjoy,
DoN.
--
Email: | Voice (all times): (703) 938-4564
(too) near Washington D.C. | http://www.d-and-d.com/dnichols/DoN.html
--- Black Holes are where God is dividing by zero ---

In article , says...

5) A photo sensor in the path of that strobe which triggered the
high-intensity one actually taking the photo.

6) Fine tuning of the timing was accomplished by moving the photo
sensor in (5) above to let the speed of light make very small
adjustments to the timing


Well, you could move the photo sensor up or down (earlier or later) in path of
the moving drop, which certainly would affect the timing of the strobe
trigger, which is what I think was described. The way it is done today is
with a variable one-shot delay between photosensor and strobe trigger, which
is easier than moving the sensor physically. This uses the speed of the drop,
not the "speed of light". The "speed of light" can be considered infinite for
this purpose, and has absolutely nothing to do with it.

The drops that were linked are just average drops, but with good color added.
If you want to see some great drops, checkout http://www.pbase.com/daria90
which makes me green with envy.

--
Wayne
http://www.scantips.com "A few scanning tips"

Wayne wrote:
The drops that were linked are just average drops, but with good color added.
If you want to see some great drops, checkout http://www.pbase.com/daria90
which makes me green with envy.

If you like those, you'll love these:
http://www.liquidsculpture.com/fine_art/index.htm

In his blog, he describes the equipment he's built to trigger the shots.
Absolutely awesome.

Cheers,
Richard

According to Wayne :
In article , says...

5) A photo sensor in the path of that strobe which triggered the
high-intensity one actually taking the photo.

6) Fine tuning of the timing was accomplished by moving the photo
sensor in (5) above to let the speed of light make very small
adjustments to the timing


Well, you could move the photo sensor up or down (earlier or later) in path of
the moving drop, which certainly would affect the timing of the strobe
trigger, which is what I think was described.

That was (of course) the coarse timing adjustment.

He did still have the optical link between the low-power strobe
pointed away and the movable photosensor. This was about 1960, FWIW.

The way it is done today is
with a variable one-shot delay between photosensor and strobe trigger, which
is easier than moving the sensor physically. This uses the speed of the drop,
not the "speed of light". The "speed of light" can be considered infinite for
this purpose, and has absolutely nothing to do with it.

The speed of light is such that a nanosecond can be represented
by a quite short length of wire easily held in one hand. But he *was* doing
such motions of the detector to adjust the timing. (Perhaps the
response time of the detector was in part a function of the intensity,
so he was adjusting the time delay needed to reach the threshold of the
detector. Since the light would fall as the square of the distance,
this may have been what he was actually using.

The drops that were linked are just average drops, but with good color added.
If you want to see some great drops, checkout http://www.pbase.com/daria90
which makes me green with envy.

Those are excellent examples.

Enjoy,
DoN.
--
Email: | Voice (all times): (703) 938-4564
(too) near Washington D.C. | http://www.d-and-d.com/dnichols/DoN.html
--- Black Holes are where God is dividing by zero ---