Hello just wanted to put together a support list of electronic adapters that work for ef-e lens control. I tried using a Metabones speedbooster today and had no luck for iris.
I have an old Commlite EF-E HS which works just fine. Tested with on the Spark successfully including the Sigma 18-35, and various Canon lenses.
I had to send my Sigma in for a lens update before it worked well. Would only go down as far as F4 before the lens firmware update.
would love to keep this running. Ive tested both of my Metabones EF-E T Cine and Metabones EF-E T Speedbooster ultra with no ability to change iris. hoping we can figure this out shortly. would love for it to work!