My XL2 20x with 1.6 extender
 

I shot this from about 150 yards away; it was a former president making a presentation...
I don't have any credentials for access. The setting is a large outdoor pavilion on the beach
bright outside and little artificial lighting inside
I have no access to audio other than ambient audio
What I was most interested in was reach with the 20x zoom and the 1.6 extender

President & Laura Bush visit the Mississippi Gulf Coast to address the 1st Responders - CNN iReport