This is interesting and from Engadget:
"You're now gazing at President Barack Obama's just-released official portrait -- the first of a U.S. president ever taken with a digital camera. That means we can peek at the EXIF data -- this fine specimen of portraiture was snapped with a Canon EOS 5D Mark II
on January 13th, 2009 at 5:38 pm with no flash, using a 105mm lens stopped to f/10 at a 1/125 exposure, with an ISO of 100 by newly crowned official White House photographer Pete Souza."
