Just picked up a 70-200mm f/2.8L. Should I get a filter?

BozillaNZ wrote:

That's only what Canon says. Canon said 5D2 is weather sealed, is it?

I took apart my 70-200 IS II and found that the front is not sealed until you have a filter installed in place. There is a big gap behind the filter ring to the front element where water/dust can leak in.