A nearby camera store organised a "long lenses day" today.
You could bring your EOS and hook it up to all of the top tele's.



Front to back: 500, 600 and 800, taken with the 200 f2.
Other lenses were the 400 f4 DO, 400 f2.8 and the 300 2.8.

Had a great hour playing around with these awesome monsters.
They even gave me an EF lens clock when I left. 

Thanks Canon