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Author Topic: Tethered using strobes  (Read 1055 times)

wmchauncey

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Tethered using strobes
« on: March 12, 2015, 07:26:23 am »

I'm a fan of shooting tethered for my tabletop photography for real-time composition and lighting info.
New problem arises when I purchased a strobe flash unit for high speed work.   
http://www.bhphotovideo.com/c/product/501613-REG/Impact_VSD_300_VSD300_Digital_Monolight.html

Is there any way that I can get that real-time preview of the strobes effects while shooting tethered?
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Ellis Vener

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Re: Tethered using strobes
« Reply #1 on: March 12, 2015, 02:44:06 pm »

"Preview?" only if if you use decent modeling lights

I looked at the flash duration specs for your  light. At full power they claim '1/800" and at minimum power "1/1800" . since they do not specify whether the FD measurement standard used was either  t0.5 or t0.1, I assume they are using t0.5.

What is the difference given that they both measure flash flash duration?
t0.5 measures FD when the light output is equal or greater than 50% of the maximum amount of light for the energy (w-s) setting. that is fine for general work but if you need to know how well the flash will freeze motion you need to know the t0.1 measurement - the period that the light output is equal or greater than 10% of the maximum amount of light for the energy (w-s) setting -  which is by ISO standards, the full amount of time the flash is emitting photographically relevant  light.

If they don't state the t0.1 period is there a way to calculate it?

The rule of thumb for non-IGBT technology flashes is that if you only know the t0.5 time multiply it by 3.

In your case, a t0.5 of 1/800  to  1/1,800 means the  t0.1 times are to get a  t0.1 range of 1/266 to 1/600th.

In the sub $500.00 price range the better option is a Paul C. Buff Einstein E640.The specs are here: http://www.paulcbuff.com/e640.php  I've been using them for portrait, advertising and industrial work for several years and they have proven themselves to be rock solid. 

here's an example of the Einstein's motion stopping capabilities
« Last Edit: March 12, 2015, 03:07:15 pm by Ellis Vener »
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Some Guy

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Re: Tethered using strobes
« Reply #2 on: March 12, 2015, 03:07:26 pm »

What Ellis said as to modeling lights and if they will track right right along with the flash output.  Plus the tethering software needs to allow for Live View.  I think that the CamRanger does work using Live View for wireless tethering.

SG
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adpix

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Re: Tethered using strobes
« Reply #3 on: March 12, 2015, 09:25:01 pm »

While I would agree that Einstein's are solid, there is one caveat to their claim of maintaining white balance at varying power settings.  While that is reasonably true with individual  Einsteins, one cannot assume that color will agree between several Einsteins at full power. I just bought two new ones to compliment two older ones, and they all test out differently on my color meter--by 200 degrees Kelvin. I had hoped to quit the Rosco gels I have used on other Buff products, but that is not to be. It does seem that if I photograph more expensive arts, I am must mortgage the house for Swiss or Swedish strobes.
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wmchauncey

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Re: Tethered using strobes
« Reply #4 on: March 13, 2015, 04:27:27 am »

I would have bought the Einsteins but they were an extra $220.
Shooting in a darkened room does not allow for live view subject visualization...at least as far as I know.     ???
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