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FORUMS General Gear Talk Flash and Studio Lighting 
Thread started 17 May 2012 (Thursday) 11:47
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600EX-RT for fill with sunlit background

 
dmward
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May 17, 2012 11:47 |  #1

I wanted to do some additional testing with my 600EX-RTs to find out just how well they will work for fill flash with the subject in shadow and the background sunlit. More or less a normal wedding day situation. :-)

I also wanted to see what the impact of F stop would have on the background; a line of trees about 40 ft behind the subject. And I got the additional benefit of seeing how good the off center zone focus capabilities of the 5D3 will be capturing focus since I was the only subject available. (So bear with the self portrait examples. :-) )

5D3 with 85mm F1.2L II on a tripod about 8 ft from subject. I set the AF to lowest right using the zone capability. That showed there were 4 AF segments active.

The camera was set to Av, ISO 50, -1 EV exposure compensation, metering is evaluative.

Flash was on a stand about 4 ft from subject camera left and looking down about 45* through a Westcott 32" collapsible umbrella. Flash was ETTL with HSS activated and no flash exposure compensation.

The focus at F1.4 isn't precise because of the hit or miss nature of a self portrait.

This is the result at F1.4, 1/3200;

IMAGE NOT FOUND
IMAGE IS A REDIRECT OR MISSING!
HTTP response: 404 | MIME changed to 'text/html' | Byte size: ZERO


This is at F4.0, 1/800;
IMAGE NOT FOUND
IMAGE IS A REDIRECT OR MISSING!
HTTP response: 404 | MIME changed to 'text/html' | Byte size: ZERO


and this is F8.0, 1/100; Here the forehead reading was about 1/2 stop hot. Pulling exposure down -.5 brought the forehead reading to within 2 %. All the shots with shutter speeds above sync speed had readings within about 2% of each other.

IMAGE NOT FOUND
IMAGE IS A REDIRECT OR MISSING!
HTTP response: 404 | MIME changed to 'text/html' | Byte size: ZERO


This was accomplished with the 600EX-RT, realistically the same results would occur with a 580EX or 580EXII, or a Nissin Di866 etc.

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aztecdaz
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May 17, 2012 12:04 |  #2

Looking good. Im planning on doing something similar myself over the weekend utilising the st-e3 but so far it looks as if this is a winning set up, my pocket wizard flextt5s were sometimes a bit unpredictable especially when in HSS


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kouasupra
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May 17, 2012 12:43 as a reply to  @ aztecdaz's post |  #3

Great testing David. From your testing do you think it's worth upgrading to the 600EX-RT?




  
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dmward
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May 17, 2012 12:55 |  #4

kouasupra wrote in post #14446255 (external link)
Great testing David. From your testing do you think it's worth upgrading to the 600EX-RT?

That's an interesting question.
I used PocketWizard ControlTL stuff with Nissin Di866 flashes for a couple of years and they work well.

I got the 600EX-RTs primarily because I was also planning to get a 5DIII.

There are definitely some nice features, and especially using the two together.

They really don't deliver more or better light than 580EXs or Di866s.

For me it was kind of a combination gear head and wanting to have the absolute minimum amount of equipment when I'm shooting alone.

Its really going to be a personal decision for everyone.


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Mikey1
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May 17, 2012 12:57 |  #5

straight on or through an umbrella?


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May 17, 2012 13:08 |  #6

Mikey1 wrote in post #14446309 (external link)
straight on or through an umbrella?

OP said through 32" Westcott umbrella



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dmward
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May 17, 2012 14:56 |  #7

chris_holtmeier wrote in post #14446357 (external link)
OP said through 32" Westcott umbrella

For sure. I have some test shots straight, the shadows are very sharp. Using the flash without softening the transitions would make for a much less pleasing result.

Here's the on-camera direct shot for reference. F1.2, 1/4000. It was about half a stop hot on the forehead as well.


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dmward
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May 17, 2012 15:15 |  #8

Thought I might as well complete the explanation by showing a shot without flash.
This was pulled up 2/5 stops in lightroom to get the forehead to read the same as it does in the flash images. F1.2, ISO 50, 1/4000.


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kouasupra
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May 17, 2012 15:51 |  #9

dmward wrote in post #14446302 (external link)
That's an interesting question.
I used PocketWizard ControlTL stuff with Nissin Di866 flashes for a couple of years and they work well.

I got the 600EX-RTs primarily because I was also planning to get a 5DIII.

There are definitely some nice features, and especially using the two together.

They really don't deliver more or better light than 580EXs or Di866s.

For me it was kind of a combination gear head and wanting to have the absolute minimum amount of equipment when I'm shooting alone.

Its really going to be a personal decision for everyone.

I also have the pw mini/flex system with my 580ex ii. It works fine with my 5D3, but the 600ex compliments the 5D3 really well. I love the new features on the 600 and especially the larger lcd, but with the same power output. I don't know if it's worth the extra money.

Too much toys to buy, and yet so little money..LOL.




  
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May 20, 2012 23:37 |  #10

fantastic test


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May 23, 2012 01:13 |  #11

dmward wrote in post #14446302 (external link)
That's an interesting question.
I used PocketWizard ControlTL stuff with Nissin Di866 flashes for a couple of years and they work well.

I got the 600EX-RTs primarily because I was also planning to get a 5DIII.

There are definitely some nice features, and especially using the two together.

Hi dmward, just wondering what advantages a 600EX-RT has with the 5D mkiii?

I am in the market for a 5D3, and also a new flash.


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May 23, 2012 06:22 |  #12

kobeson wrote in post #14472143 (external link)
Hi dmward, just wondering what advantages a 600EX-RT has with the 5D mkiii?

I am in the market for a 5D3, and also a new flash.

Built-in radio triggering.



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May 23, 2012 19:27 |  #13

chris_holtmeier wrote in post #14472639 (external link)
Built-in radio triggering.

But wouldn't a radio transmitter still be required? Or does the 5D3 not require one?!? Apologies for my amateurish questions :o


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May 23, 2012 19:57 |  #14

kobeson wrote in post #14475760 (external link)
But wouldn't a radio transmitter still be required? Or does the 5D3 not require one?!? Apologies for my amateurish questions :o

In its own menu system, the 5D3 (and eventually the 1DX) supports the radio capabilities of the 600 and ST-E3.




  
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timnosenzo
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May 23, 2012 21:34 |  #15

The radio function will work on the 600EX-RT's with any Canon DSLR, but there are some functions that will only work with the 5D3 or newer cameras. I can't recall what it is off the top of my head, but the 600EX manual spells it out.


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600EX-RT for fill with sunlit background
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