Re: Impressive Shot

On Jul 30, 6:33 am, Wayne R. <wruff...@xxxxxxxxxxx> wrote:
My first reaction is that this has to be Photoshopped, but I'm not
sure. It sure looks good, but a miracle of timing & focus or just a
zillion tries?

Not sure rings can form as fast as this image makes it appear. But the
reflected splash looks right.

<http://1x.com/OEfullSize/25887-fullsize.jpg>

It's not my image, don't know where it came from - but I'm curious
what everyone's thoughts are...

It's a straight shot. The projectile looks like a 20 caliber/5 mm air
rifle slug and the lighting is probably bounced from a portable
flash. It's not a miracle of anything, but careful planning and a
little technology.

Step 1. Get the drop right - It's one drop from a fixed distance
which will give you the height you need for the drop. That takes some
experimentation, but you can also calculate it. Not only must the
drop height be fixed, the exact position needs to be fixed to that the
drop lands in the same place everytime.

Step 2. Get the focus right - DOF takes care of a lot of this for
you. You want it to be deep enough to cover the splash and the
radiating rings plus some. Use a wire set into a base and place it in
the liquid at the point the drop will land. Focus on it.

Step 3. Hit your target everytime - Use the wire you focused on to
set the aim of the pellet rifle and lock the rifle down in that
position. You want to knock the wire down.

Step 4. Get the shot - The flash is your total exposure and you
trigger it off the sound of the drop hitting the liquid. That is the
key event. You will be triggering two things: the flash and the
pellet rifle. The pellet rifle would be fired off a solenoid
connected to the trigger and will be triggered before the flash. This
means using a sound based triggering circuit with two independently
setable delays.

The relationships between events are fixed in time. You know when you
want the exposure to occurr, you can figure out within reason what's
happening physically and when in relation to the sound of the drop
hitting the liquid. You work back from what you want to the timings
needed, set the triggering and fine tune.

Are regular hot shoe flashes fact enough for this? I can't speak for
any flashes but the ones I use, but similar types of flashes should be
capable of the same thing. My Canon flashes, and my Vivitars, 'turn
down' the power by shortening the duration of the flash. Set at 1/128
power, the flash duration is about 1/40,000 sec compared to the full
power which is something like 1/1,200 sec.

Turn off the room lights, drop your drop, season to taste.

Work yes, miracle, no.

Vance
.

Relevant Pages

  • Re: Impressive Shot
    ... but a miracle of timing & focus or just a ... set the aim of the pellet rifle and lock the rifle down in that ... Get the shot - The flash is your total exposure and you ... You will be triggering two things: ...
    (alt.photography)
  • Re: Impressive Shot
    ... reflected splash looks right. ... set the aim of the pellet rifle and lock the rifle down in that ...  You will be triggering two things: the flash and the ... means using a sound based triggering circuit with two independently ...
    (alt.photography)
  • Re: Inexpensive flash for Canon?
    ... A sync cord with a cheaper flash (like the Speedlite ... triggering a remote wirelessly. ... bounce can also work nearly as well as a remote. ... Yes but I would like to try working with an umbrella. ...
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