So based on those articles, there really isn't much history showing that Birger will even deliver for NAB. So that kind of shoots down the plans to get canon, at least novoflex has a good adapter for nikon and perhaps in the future Birger will have a nikon mount, but in the meantime with high end nikon glass and the novoflex adapter, I'll have full manual control over my lenses. I've heard a lot of hot and cold over the kipon, so spending $200 on an okay adapter or spending almost $300 on one with real aperture control and much better quality sounds like a better bet.