Whitehorsevideo wrote:There is no manual Iris on this lens so I'm trying to use a VariZoom VZ-Rock LANC controller which has always worked well on my video rigs.
The focus control does work although it's kinda lumpy. No subtlety.
The f stop doesn't work at all. So there's no way to adjust the Iris? This is nuts.
I believe it.s ver. 1.2 because I see a purported iris value that seems to vary between 3.5 & 5.6 but I can't get an f16 no matter how much light I pump into it.
So it seems that the EF specification is only partially implemented and supported.
Anyone else?
You don't mention what lens.
As you'll see from the list on page 1 most EF lenses work however there are a handful that currently don't have aperture control. These all appear to be communicating correctly with the camera (the camera recognises the max and min aperture) but don't physically change the aperture.
Blackmagic are no doubt working on this for future updates. Even Metabones took a while to get a wide range of lenses to work on their smart adaptor (about 4 firmware revisions) and they only had lens communications to deal with.