Black Fringing, cuase?

I am sure it is my strobes, but not sure what is causing it or what I am doing to make it happen. I had 2 lights one to my left and one on the right behind the baby a little. Someone surely has seen this before and can tell me what dumb thing I am doing to cause it.

I used 3 different lenses and have also tested the camera they dont do it when not using the strobes.

Thanks in advance.

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Your shutter speed is too high.
Depending on the type of camera, you can't go faster
then about 1/200, 1/250.
This is also known as the X-sync speed.

Greetz,
André

Im sure that is not it, I always shoot at 200 when doing studio work. All 3 lenses also had there hoods on I wonder if that makes a difference. I have only had this once before and just shrugged it off, but really would like to know what im doing...

Your shutter speed is too high.

Your camera's manual recommends a shutter speed slower than X-sync when using large studio strobes, since many of them have a longer flash duration than Speedlites (especially at low power settings).

Radio based flash triggering systems also introduce a small delay in the flash, requiring slower sync speeds.

Whatever shutter speed you're using, slow it down a notch or two and the problem will go away.

I also agree that it's the shutter speed being too fast for the strobes being used. However, it's not the long flash duration that's causing the dark edges on the right side of the frame. The dark edge is caused by a delay in firing the strobe and can either be caused by the strobe itself being slow to fire or, as Curtis said, a slow-triggering device like an RF remote placed in-between the camera and the strobes. The simple solution to this problem is to reduce the shutter speed by a third of a stop or so.

I agree with others shutter speed to high On your 5D with studio strobes max safe shutter speed 125

Shawn - I also agree that the problem is likely to be a too-fast shutter speed.

Rather tha arguing the point, though, simply run a series of test shots with the aperture kept constant (adjusted for good exposure) and varying the shutter speed. That will answer your question very quickly.

THANKS GUYS!!! I do use PW's to fire my strobes, I ran some tests and that is what is happening. That is awesome and easy to fix. I guess we learn things the hard way.

Thanks again!

You may find this thread interesting. It contains test shots from me, Leo and others that demonstrate the delay of Skyports, PocketWizards, and the effects of different strobe power settings.
https://photography-on-the.net/forum/showthre​ad.php?t=429444