Metabones Ultra on FS-7

[drchevalier]

Hello,

Please pardon what may be a dumb noob question. I have an FS-7 on extended loan with the 18-135. I have also used the E mount 10-18 on it. I understand that most pros don't use autofocus, so bear with me.

I have a substantial collection of Canon EF L series glass. I can mount it to the FS-7 with a Metabones Speedbooster Ultra. Iris control works, albeit not speedily. AF seems to sort of work but it's very inconsistent. I understand from the Metabones site that the Ultra has two modes. I've followed the guidelines to switch modes, but I cannot find any difference in the operation.

I am sure that I have missed something integral. If any of the other members can offer guidance in maximizing the return on the Metabones Speedbooster Ultra it will be sincerely appreciated.

Best regards,

Ross