You can easily see the issue watching the picture to the left. 3/4 of the image are black and not lit by the flash.
Here is my setup: one King receiver and one Opas transmitter. A speedlite is mounted to the Opas receiver. The King transmitter is mounted to the hot shoe of the 5DMKII. I used several different speedlites like the Canon 580EXII, 430EXII, YN 565EX and the YN460 without getting different results. Below you can find a list of setting I tried. If the exposure time is long enough and the flash is on the 2. curtain I can get a fully exposed image. With all other setting I get a small strip exposed letting the rest of the image remain black.
|Exposure Time||Transmitter Settings||Result|
|1/200||manual, 1. curtain||black bar|
|1/100||manual, 1. curtain||black bar|
|1/50||manual, 1. curtain||black bar|
|1/25||manual, 1. curtain||black bar|
|1/10||manual, 1. curtain||black bar|
|1/2||manual, 1. curtain||black bar|
|1/200||manual, 2. curtain||black bar|
|1/100||manual, 2. curtain||black bar|
|1/50||manual, 2. curtain||black bar|
|1/25||manual, 2. curtain||no black bar|
|1/10||manual, 2. curtain||no black bar|
|1/2||manual, 2. curtain||no black bar|
While I did the initial test with a King transmitter running firmware version v1010 I updated today to v1020. Sadly the situation did not improve.
If there is anyone who encounters this issue too or got a solution for it please let me know.
There is a discussion on flickr about this too:
Pixel King Review - ETTL Flash Trigger/Controller
Pixel KINGS & Opas - some cool compatibility.