I've noticed some people saying the 17-40L isn't so hot, but I've never owned it and probably never will. Not that I think poorly of the 17-40L, but because I don't have much need for that focal range.
Anyway, it got me wondering which Canon L lens is the worst. Is it the 17-40L? Is it one of the super-zooms (28-300L, 35-350L), or *shudder* the 100-400L? What about the L primes, any bad ones?





