If it is of any interest to anyone.......
I bought the EW-83DII for a 16-35 but it is a very tight fit and needs some force that I have abandoned that and now use the EW-83H hood which is off the 24-105.
Works fine on a 1DMKII with the 1.3 crop
Here is an article that may help.
David Burren Photography - Alternate Canon hoods