I bought this lens assuming it would be an upgrade from my EF28-105 and 28-200mm tamron xr. I was wrong, both the ef28-105mm and the 28-200 are sharper at 28mm even when stopped down. Pass on this prime, 5 element construction is not enough, even my cheapo 22-55mm usm is sharper.
Small; handles flair well
soft edges; outclassed by ef 28-105mm and ef 22-55mm