Catching the shutter at 1/160th?

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.

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

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

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

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

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.

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.

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.

ganginwood wrote in post #15225712
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

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

Thanks though. It should solve my problems

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

Thanks though. It should solve my problems

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

ganginwood wrote in post #15225628
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.

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

BrandonSi wrote in post #15228109
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.

doidinho wrote in post #15228141
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.