One of these is too big.
One of these is too small.
I had a ditch to fill in today and I tried them all. Boy am I glad I got an education. I sure don't want to operate one of these for a living...
Shot with 40D & 50mm 1.4 at f2.8, 1/125th, iso 100, lit with a single 580EX set on manual and reflected in an umbrella at full power.