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FORUMS General Gear Talk Flash and Studio Lighting 
Thread started 27 Feb 2014 (Thursday) 00:49
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Flashes for HSS and water drop photography

 
AmitShinde0511
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Feb 27, 2014 00:49 |  #1

I recently purchased my first flash Canon 580 EX II. I am interested in HSS (water drops, fast action shots, etc) .What should be ideal setup for this kind of photography.

1) How many flashes do I need for high speed photography (HSS)?
2) If I want to use 2 or 3 flashes, do they all need to have HSS capability?
3) What will be my cheaper options? Youngnuo has enough versions to confuse me.


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JeremyKPhoto
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Feb 27, 2014 01:30 |  #2

You do not need HSS for water drops. Just go to the highest sync speed of your camera. An image below as at 1/200 (all exif is intact). For fast action, what are you thinking? 1. You really only need 1 HSS flash to be able to take pictures using HSS. The look you are going for and what you are shooting will cause it to vary. 2. If you want to use HSS, then you will want the other flashes to be capable of it as well, but water drops do not need it. 3. I do not know for this one. I personally use a 430 and a 580 for my HSS needs.

My lighting setup here was a single speedlite bouncing off the wall behind the bowl of water.

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Feb 27, 2014 22:17 |  #3

HSS absolute does NOT freeze action...when HSS is being used, it is the SHUTTER which is the SOLE determinant of any action stopping!

A flash which is emitting HSS light is effectively a CONSTANT SOURCE... no different in concept than ambient light.


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dmward
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Feb 27, 2014 22:32 |  #4

Wilt wrote in post #16723233 (external link)
HSS absolute does NOT freeze action...when HSS is being used, it is the SHUTTER which is the SOLE determinant of any action stopping!

A flash which is emitting HSS light is effectively a CONSTANT SOURCE... no different in concept than ambient light.

What Wilt says.
If you want to stop water drops what you want to do is use a speedlite at 1/4 or less power.
As power is reduced in a speedlite the flash duration is reduced. Thus creating a better action stopping capability.

The bit of water drop that I did was with speedlites at 1/8th power. 1/16th would be even better.


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nathancarter
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Feb 28, 2014 10:14 |  #5

Alternate method: Instead of relying on a fast shutter speed to freeze the action, use a dark room and a long shutter speed, and fire the flash when you want to make the exposure.


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gonzogolf
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Feb 28, 2014 10:24 |  #6

Perhaps a discussion of how a strobe freezes motion is in order. When you shoot something where there is no (or very little) ambient light contributing to the exposure the flash becomes your sole source of light. The duration of a flash is very brief, in a low power speedlite it can be less than 1/1000 of a second. So since your subject is only lit for the duration of the flash, you can stop motion regardless of the shutter speed. As mentioned above in a totally dark room your shutter speed could be 1 minute, but still stop motion because of the duration of the light. Back in the 40's photographer/scientist​s were freezing bullets in mid air using a short duration arc light in a totally darkened room. Google freezing bullets if you want to see.




  
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jt354
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Feb 28, 2014 15:33 |  #7

nathancarter wrote in post #16724093 (external link)
Alternate method: Instead of relying on a fast shutter speed to freeze the action, use a dark room and a long shutter speed, and fire the flash when you want to make the exposure.

This. You can even shoot in a room with *a little* ambient light if you adjust your camera to take a 3+ stop underexposed photo without flash and then add the speedlight to yield proper exposure.


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dmward
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Mar 01, 2014 00:01 |  #8

Simplest approach;
Adjust ISO, shutter speed and F stop, preferably with shutter speed as x sync until the in camera exposure meter shows at least three stops of underexposure. Once you've found that take a test picture to ensure that the frame is black.

Then setup a speedlite so it will expose a white clump of paper towel just below the blinkies. This may mean placing the speedlite about 2 feet or less from where you're going to make the drop because you want it to be at 1/4 power or less.

Have fun.


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AmitShinde0511
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Mar 03, 2014 11:21 |  #9

Thank you all for replying. I will try different things and let you know how it worked.


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Flashes for HSS and water drop photography
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