RobJ wrote:
Thanks very much for the reply and the information. I do have one 'L' lens -
the 70-200 f/4. I'll build on that over time.


I'm pretty sure the f/4 L doesn't have the sealing gaskets ... the
f/2.8 L doesn't either, but the newer f/2.8 L IS does, so it's a fairly
recent modification.