It looks like there's two versions of the 11-16 Tokina?
This one appears to go on the 5D Mark II body?
http://www.amazon.com/Tokina-11-16mm.../dp/B0014Z3XMC
I thought it was an APS-C mount so only went on the older style bodies?
Jason,
I've used the 17-40mm and it's a great landscape lens, but at f/4.0 it's too slow for nightscapes.
You're right about 10-11mm being really wide on a FF body, but I can always zoom to 16mm of the 11-16
