it puzzles me that some L lens have really questionable build quality:
EF100-400/f4.5-5.6 IS USM L
EF 28-70/2.8 USM L
these lenses extend so precariously when zoomed. there is no feeling of " rock-solidness" unlike L lenses like eg EF70-200/f4 USM L which do not change shape and size when zoomed and you feel more comfortable using holding it.
do u all agree? thanks hehe