Here's another conductor portrait. The lens is Canon's 50mm 1.4. Focusing with the lens is not a speedy process and the result often strikes me as a bit soft or slightly inaccurate--including this shot (in the end I liked the look of the conductor too much to discard it). I would be curious to hear what experience others have had with this lens in terms of focusing speed and accuracy.
For more conductor portraits, see this set on flickr.