>The Q3 will handle both of those lenses well because they are >collared and therefore well balanced. >
I much appreciate your input, Neil. However, I'd just realised that my 200mm f/4 micro doesn't have a collar like the 80-400mm. I think I'd purchased it used at a deep discount way back since it did not have one or it was removed.
I was wondering if and where I would be able to acquire one for this particular lens even if from a 3rd party.