Technical Support wrote:
The idea behind the speedring cage is to position the light properly in the PLM. This adapter looks to extend the speedring position out from the flash tube.
I would suggest simply using the 8mm shaft version with the Bowens mount light.
Yes, I was wondering if the adapter would impact the projection of the light given it appears to extend the speedring position and "cuff" the flashtube more than usual. Hence my curiosity as to whether anyone has tested these.
I've already got my PLM's (64-inch versions) with the Elinchrom speedring/cage assembly and 7mm shaft as I have the Elinchrom lights as well. My hope was to keep the umbrella properly centered on the Bowens using this adapter.
I was told the 7mm will also work in the Bowens lights?