Canon EF 600 f/4L IS II
I received my Canon EF 600 f/4L IS II today, and I must say it's pretty exciting to get new big glass.
No matter how many times you read about the weight difference between this one and the previous version, you just don't have a handle on it until you hold the lens. I cannot believe it weighs the same as the Canon EF 500 f/4L IS. It's completely hand holdable and well balanced. Construction feels wonderfully solid and apparently the weather sealing is better than the previous version.
It comes with a shorter foot, probably making monopod use easier. It also comes with the new style lens cover, a lens strap as well as a strap for the hard case. The manual is also on paper not on CD.
As suspected, it shouldn't be a problem getting any of your Arca style plates to fit on the lens.
I will be heading out to do some birding this week with the new lens, I will report back with what will be pretty obvious information…. i.e. “it's sharp, it's great, it costs a lot”.