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Highspeed Photography: Drop photo
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Adalbert



Joined: 30 Nov 2015
Posts: 239

PostPosted: Mon May 08, 2017 4:43 am    Post subject: Reply with quote

Hello Frank,
great, well done!
I have just finished the assembling of my equipment with two magnetic valves and would like to try to take some photographs of the water drops.
Would you please be so kind as to tell me which delays should I use?
e.g. Distance = 40cm, pipe = 4mm, valve1=50ms ; wait for valve2=100ms, valve2=40ms, wait for flash=250ms
Thank you in advance.
BR, ADi
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nathanm



Joined: 02 Jun 2016
Posts: 220
Location: Bellevue, WA

PostPosted: Wed May 10, 2017 1:32 pm    Post subject: Reply with quote

What lens and f-stop?
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Frank Fox



Joined: 27 Jun 2011
Posts: 191
Location: Trier, Germany

PostPosted: Thu May 18, 2017 7:32 am    Post subject: Reply with quote

Hello everyone and thank you.
I forgot to answer.

I use the Canon 5DMII. All photos are flashing, some with three flashes.
The drops are partly colored and also some flashes are colored.
The delays I had not written down with this setup.
The delays are also dependent on the tolerances of the valves and the size of the drops.
However, they were about 110 ms, drop height about 45 cm.
Lens: Canon EF 100mm / 1: 2.8 USM Macro
Use aperture 16.
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nathanm



Joined: 02 Jun 2016
Posts: 220
Location: Bellevue, WA

PostPosted: Fri May 19, 2017 8:06 pm    Post subject: Reply with quote

f/16 will get you a lot of diffraction.... roughly how big is the splash - i.e. are you at 1:1 magnification (24mm x 36mm subject) or bigger?
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Frank Fox



Joined: 27 Jun 2011
Posts: 191
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PostPosted: Tue May 23, 2017 12:28 am    Post subject: Reply with quote

The magnification was about 1:2.
The diffractions are not recognizable and the quality of the photo is acceptable.
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tbransco



Joined: 30 Dec 2013
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PostPosted: Wed May 31, 2017 11:30 pm    Post subject: Reply with quote

Frank Fox wrote:
. . . the quality of the photo is acceptable.


Exclamation The quality of your photographs is exceeded only by the quantity of your understatement. Cool
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nathanm



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PostPosted: Thu Jun 01, 2017 8:12 am    Post subject: Reply with quote

That's for sure!
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