I was goofing around with the yongnuo rf602 using it to trigger remote shutter and remote flash on an alien bee 400. When I triggered the shutter and flash the camera was well behind the flash. I was at 1/200 shutter speed. Using the camera to trigger the remote flash no problem! Using a different set up to remote trigger the shutter on a different frequency and letting the camera initiate the trigger for the remote flash no problem again! Has anyone any experience with this?