My preorder is in, but I'm getting cold feet. I was hoping that the readout speed would be on par with the R3, but that's not that big of concern if the AF is as improved as suggested. What gives me pause is that I can't for the life of me think of what lens(es) I'd use to harness this great tech. I've got the 100-500L, which is okay but not comparable to an exotic prime for wildlife shooting. I'm not spending $10k plus for one of Canon's, and I'm not being a used EF lens, so there's no lens that fits my needs or on the horizon. A 600mm DO would be perfect, but I'm no holding my breath. So, I'll likely cancel that preorder until there is a compelling long lens offering in ZF.
