Had a great day at the Athletics with my D7000 and hoodless Sigma 150-500mm, 18-105mm kit lens and 10.5mm fisheye. People sitting either side of me were very understanding when I whipped out my Sigma! Guy beside me then pulled out his Canon 100-400 with hood attached! Had people around us chuckling with the sight of the ridiculous length of our lenses! Army guys at X-ray machines had no questions whatsoever when my bag passed through. Also saw so many tripods around the Olympic park!