Attached Link: 500mm F 2.8

One for those who like a fast lens !

comes with a teleconverter to make it 1000mm F5.6.

don't forget to budget for filters and a set of scaffolding to put it on :D

And every one said, 'If we only live,
We too will go to sea in a Sieve,---
To the hills of the Chankly Bore!'
Far and few, far and few, Are the lands where the Jumblies live;
Their heads are green, and their hands are blue, And they went to sea in a Sieve.

Edward Lear
http://www.nonsenselit.org/Lear/ns/jumblies.html