Thanks BeBu, I think I'm starting to understand better now. And, that was my fear, I think we are many years from being able to have a mirrorless body that will use all the DSLR glass we have (or never), without some sort of compromise. I don't want to deal with adapters either. I think when the D810 replacement comes out I'll keep going that way, and worry about mirrorless... down the road.