Thanks guys for answering the questions I was also wondering about. I am about to buy a BMPCC very soon but I am now struggling with what lense to get and what adapter/speebooster to use with. My only problem now is stabilization . I heard that some BlackMagic firmware update is helping with stabilization, but is this feature also working with a lense that has NO stabilization?
(BTW I am also interrested about Canon 24mm f2.8 IS USM or TAMRON SP 17-50mm f/2.8 XR Di-II VC, and since you say they work fine with this release mount trick I am probably going to choose one of those two)