Some of us have a heavy investment in other glass, like Leica M. Given an M Mount is available for other RED models it's quite frustrating.

It's pointless to me and a total deal breaker, I was planning to place an order but this has screwed that up. I'm not spending that much money on a camera to put sloppy canon lenses on. There's always a damn gotcha!

I was really going to get this until I read fixed Canon EF. That is a total deal breaker for me, bad news.