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FORUMS General Gear Talk Flash and Studio Lighting 
Thread started 04 Oct 2012 (Thursday) 13:27
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canon 580ex ii question

 
jrockroll
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Oct 04, 2012 13:27 |  #1

Hey all

one day I took the flash with me and took some shots but it was over exposed by a lot.
Even I was lowering the power, shots were over exposed.(even at -4) Any idea what I have to change?




  
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touji
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Oct 04, 2012 13:36 |  #2

Example pictures? Settings?


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symbolphoto
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Oct 04, 2012 13:52 |  #3

Too little information here, but it's also well known that if there is play in the flash and hotshoe, sometimes the contacts can reset the power levels of the flash. Or so i've read. Never happened to me...




  
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Oct 04, 2012 14:26 |  #4

jrockroll wrote in post #15079581 (external link)
Hey all

one day I took the flash with me and took some shots but it was over exposed by a lot.
Even I was lowering the power, shots were over exposed.(even at -4) Any idea what I have to change?

There is no -4 of FEC! It sounds like you had a bad connection between your flash and hot shoe.


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Nick ­ Porcaro
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Oct 04, 2012 14:31 |  #5

I'm gonna take a wild guess that you needed to enable highspeed sync on the flash. If you were shooting in bright conditions that required faster shutter speeds, your shutter with the flash would have been limited to the fastest flash sync speed allowed by your camera which would result in the over exposure. Enabling highspeed sync on the flash would let your camera use those faster shutter speeds...


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DarenM
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Oct 04, 2012 15:03 |  #6

Nick Porcaro wrote in post #15079805 (external link)
I'm gonna take a wild guess that you needed to enable highspeed sync on the flash. If you were shooting in bright conditions that required faster shutter speeds, your shutter with the flash would have been limited to the fastest flash sync speed allowed by your camera which would result in the over exposure. Enabling highspeed sync on the flash would let your camera use those faster shutter speeds...

Does not the 580 automatically go into highspeed sync?


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Nick ­ Porcaro
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Oct 04, 2012 15:16 |  #7

DarenM wrote in post #15079903 (external link)
Does not the 580 automatically go into highspeed sync?

No, you've got to hit the button to set it. By default it's set to off...


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Oct 04, 2012 17:57 |  #8

DarenM wrote in post #15079903 (external link)
Does not the 580 automatically go into highspeed sync?

oh does the 600ex-rt do that automatically?


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jrockroll
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Oct 04, 2012 19:40 |  #9

unfortunately I got no photos since I deleted them right away after reviewing.
Not -4 I meant -4




  
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jrockroll
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Oct 04, 2012 19:41 |  #10

I will try with high speed sync next time. thanks




  
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pickle1
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Oct 04, 2012 20:56 |  #11

I had this happen to me on one occasion and it was the flash itself malfunctioning. No matter the setting it would over-expose the image.


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FlashZebra
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Oct 04, 2012 21:10 |  #12

jrockroll wrote in post #15080983 (external link)
unfortunately I got no photos since I deleted them right away after reviewing.
Not -4 I meant -4

Now that clears it up.

Enjoy! Lon


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Oct 04, 2012 21:13 |  #13

The last time something like this happened to me I had forgotten to reset my iso. I went from shooting inside at iso 1600 to outside in bright noon light trying to use the flash for fill and washing everything out. :oops:


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jrockroll
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Oct 04, 2012 23:52 |  #14

FlashZebra wrote in post #15081316 (external link)
Now that clears it up.

Enjoy! Lon

lol i meant -3




  
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Oct 05, 2012 09:31 |  #15

If the 580EX II is in TTL mode instead of ETTL mode, it will overexpose almost every time. TTL is only for film cameras, and since there is no way to properly measure the exposure on a DSLR, the flash will fire at full power each time.

You can accidently get TTL mode with a poor hotshoe connection, or if you play around with the custom functions and inadvertently selectt TTL mode.

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canon 580ex ii question
FORUMS General Gear Talk Flash and Studio Lighting 
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