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FORUMS General Gear Talk Flash and Studio Lighting 
Thread started 09 Nov 2012 (Friday) 06:53
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Catching the shutter at 1/160th?

 
ganginwood
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Nov 09, 2012 06:53 |  #1

5dii. Manual mode. Should this be happening and could the transmitter be to blame since it was a Cactus 4 that I used on my Pentax system?

Since its not ettl...I'm pretty sure they use the same connection.

I'll post an image to clarify.




  
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ganginwood
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Nov 09, 2012 07:04 |  #2

Also...at or below 1/125th it's fine which makes me question the speculation of a fault transmitter.




  
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Lowner
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Nov 09, 2012 07:06 |  #3

Sorry, but I don't understand what you are asking?


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lazer-jock
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Nov 09, 2012 07:12 |  #4

It is likely the radio trigger. If it was a fault of the body, it would be splashed all over the internet by now.


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dedsen
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Nov 09, 2012 07:31 |  #5

When was the last time you changed the batteries in the wireless triggers? This is usually the cause of slow sync speed.



  
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ganginwood
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Nov 09, 2012 07:41 as a reply to  @ Lowner's post |  #6

I'll check the batteries. I can change them in the receivers but not the transmitter. I'll have to look it up. I've been wondering how to do that for 2 years. Again...they are Cactus V4's.




  
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ganginwood
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Nov 09, 2012 07:42 |  #7

I just want to make sure this is not the body itself as the wireless system was flawless at 1/180th with my other system. 1/180th was max SS.




  
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dedsen
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Nov 09, 2012 08:07 |  #8

It looks like the transmitter takes a L1028 Battery. From your statement that you do not know how to change it, I would bet this is your problem.

First rule of troubleshooting battery powered devices. Change the batteries! Install new batteries and not old worn out rechargeables that are fresh off the charger. Rechargeable batteries have a useful life. Once they reach that point they need to be replaced too.



  
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shooterman
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Nov 09, 2012 08:49 |  #9

ganginwood wrote in post #15225712 (external link)
I'll check the batteries. I can change them in the receivers but not the transmitter. I'll have to look it up. I've been wondering how to do that for 2 years. Again...they are Cactus V4's.

??? 5 seconds to type in "how to change batteries in cactus v4" in Google pulls up this Flickr discussion with pics: Changing Cactus V4 Transmitter Batteries (external link)


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ganginwood
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Nov 09, 2012 08:55 |  #10

To be fair....you should've done this if you were looking for style points!
http://lmgtfy.com …ge+batteries+in​+cactus+v4 (external link)

Thanks though. It should solve my problems




  
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shooterman
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Nov 09, 2012 09:05 |  #11

ganginwood wrote in post #15225980 (external link)
To be fair....you should've done this if you were looking for style points!
http://lmgtfy.com …ge+batteries+in​+cactus+v4 (external link)

Thanks though. It should solve my problems

:lol: It crossed my mind, but it's so old it's not all that funny anymore. :D


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doidinho
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Nov 09, 2012 09:26 |  #12

ganginwood wrote in post #15225628 (external link)
Also...at or below 1/125th it's fine which makes me question the speculation of a fault transmitter.

This, drop your shutter speed down to 1/125; that's the real sync speed for a 5dmk2 when using wireless triggers.


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BrandonSi
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Nov 09, 2012 19:26 |  #13

1/160 is rock solid for my 5D2 + cybersyncs, so if you're stuck below that, it's definitely your transmitter / receivers.


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doidinho
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Nov 09, 2012 19:38 |  #14

BrandonSi wrote in post #15228109 (external link)
1/160 is rock solid for my 5D2 + cybersyncs, so if you're stuck below that, it's definitely your transmitter / receivers.

It's fairly well documented that due to latency the working sync speed with radio triggers is 1/125 for the 5dmk2. It's likely that you may not be noticing the exposure falloff toward the edge of the frame, but it's likely there. If you shoot outdoor w strobes you probably won't notice it. Depending on the lighting and composition it is sometimes hard to see even in studio situations.

Shoot enough studio shots above 1/125 though and you will see the exposure falloff sooner or later.


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BrandonSi
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Nov 09, 2012 19:44 |  #15

doidinho wrote in post #15228141 (external link)
It's fairly well documented that due to latency the working sync speed with radio triggers is 1/125 for the 5dmk2. It's likely that you may not be noticing the exposure falloff toward the edge of the frame, but it's likely there. If you shoot outdoor w strobes you probably won't notice it. Depending on the lighting and composition it is sometimes hard to see even in studio situations.

Shoot enough studio shots above 1/125 though and you will see the exposure falloff sooner or later.

I've got thousands of studio images in LR, and plenty online with EXIF intact saying otherwise, so we'll just have to agree to disagree there.


[ www (external link)· flickr (external link)]

  
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Catching the shutter at 1/160th?
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