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FORUMS General Gear Talk Flash and Studio Lighting 
Thread started 09 Jun 2008 (Monday) 13:18
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bwolford
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Jun 09, 2008 13:18 |  #1

I've been using my 430EX to trigger my studio strobes via built in slaves. Well, I thought you might find it a little amusing that I struggled for 20 minutes during a shoot trying to find out why all my shots were under exposed. Turns our I hadn't put the 430EX on Manual mode and between the camera and the flash, ETTL was throwing off all my exposures.

The client thought it a little odd that I was the one doing the sweating during the shoot... :)


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Lotto
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Jun 09, 2008 13:39 |  #2

Haha, but you shots were still lit by A flash :) Instead of sweating, I would've been swearing.


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bwolford
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Jun 09, 2008 17:53 |  #3

Lotto wrote in post #5690188 (external link)
Haha, but you shots were still lit by A flash :) Instead of sweating, I would've been swearing.

Typo ;)

Well the ETTL was doing something because my images were black despite 3 studio heads going off. Once I got the 430EX on manual I actually saw the light.


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psxindo
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Jun 10, 2008 10:19 |  #4

most likely the preflash that is doing something.


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bwolford
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Jun 10, 2008 11:52 as a reply to  @ psxindo's post |  #5

Didn't think of that. Perhaps the preflash is causing the strobes to fire before my shutter opens and then when it opens, no light.... Make perfect sense.


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hastur
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Jun 10, 2008 12:26 |  #6

It's a good thing you didn't make that mistake with film. "All the flashes fired, therefore my picture should be OK"

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bwolford
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Jun 10, 2008 20:27 |  #7

hastur wrote in post #5696426 (external link)
It's a good thing you didn't make that mistake with film. "All the flashes fired, therefore my picture should be OK"

Have Fun

Rob

So true!!!


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Titus213
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Jun 10, 2008 21:09 |  #8

Yup, that pre-flash in ETTL will really mess with your timing on strobes.:lol:


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BigBlueDodge
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Jun 11, 2008 00:41 |  #9

Actually another reason I really like the Calumet Genesis lights. They can work with the pre-flash in ETTL of your speedlight or popup flash. I have been using my 580ex in ETTL mode as a trigger to both of my Genesis 200 lights, and it works like a charm.


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Titus213
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Jun 11, 2008 01:06 |  #10

Interesting - if ETTL actually measures the light thru the lens how does that work for your exposure?


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BigBlueDodge
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Jun 11, 2008 15:25 |  #11

Titus213 wrote in post #5700225 (external link)
Interesting - if ETTL actually measures the light thru the lens how does that work for your exposure?

Not really sure. All I know is that it works, and I'm happy with that. Actually, it works with the popup flash, as well as external speed lights.


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Cyrus
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Jun 11, 2008 17:14 |  #12

been there, done that in the early days. We all tend to learn more from our mistakes than our triumphs hey




  
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dirt ­ lover
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Jun 11, 2008 17:27 |  #13

BigBlueDodge wrote in post #5700132 (external link)
Actually another reason I really like the Calumet Genesis lights. They can work with the pre-flash in ETTL of your speedlight or popup flash. I have been using my 580ex in ETTL mode as a trigger to both of my Genesis 200 lights, and it works like a charm.

Another reason I like my 285's. :D


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Stickman
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Jun 11, 2008 17:33 |  #14

bwolford wrote in post #5696245 (external link)
Didn't think of that. Perhaps the preflash is causing the strobes to fire before my shutter opens and then when it opens, no light.... Make perfect sense.




I'm dealing with that myself right now. I don't mean to hijack your thread, but I'm interested if you figured out the following, and if not, hopefully this question helps the both of us...

Anyone have ideas on how to turn off the preflash on Canon cameras?


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DDCSD
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Jun 11, 2008 17:53 |  #15

Stickman wrote in post #5704674 (external link)
I'm dealing with that myself right now. I don't mean to hijack your thread, but I'm interested if you figured out the following, and if not, hopefully this question helps the both of us...

Anyone have ideas on how to turn off the preflash on Canon cameras?

Do you mean with the built-in flash, or a hotshoe mounted flash?


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