But do I get Rev. I or Rev. II? What are the major differences? AF speed isn't a big deal I shoot mostly portraits in that FL. I like that the II is still covered under warranty and uses the newer focusing mechanism, which is one of the reasons I'm leaning toward the II since the mechanism in the I is based on the discontinued 50 1.0L
I've been using L zooms on my EOS but my Nikon system is all primes and I find myself grabbing for the Nikkor 85 1.8 pre-AI when I slap my adapter on the 5D.


