Christopher Hartman wrote:

Fred, you know what I like about this test?  Too often, way too often studio photographers poo poo f/2.8 lenses on the basis that if you shoot in the studio, you're probably shooting f/8 or higher, so why waste the money? 

they ignore that it's not just f-stops...but the QUALITY of a lens.  Even if you never shoot wider than f/8, if image quality matters to you and you want it to be the best possible, you buy the best lenses.

BINGO!