after much to do I finally got the OK from Breguet that the adapter has been shipped.I was hoping to use it on my A7r together with the SIGMA OSS 24 105 F4Comments from people who have tried this ONLY please !

Is the one you are getting the techart saker falcon one with the nor and fun switch? I have an a7r as well and would love to you it with a canon EF 50mm. F1.2 USM lens. I just don't know what the speed is going to be like.

yes , it is !