I used to like this lens more. Then I began to appreciate prime lenses. All of a sudden this zoom becomes mediocre. It's performance is average but it's versatile. I am debating whether to sell it to fund a sigma 35. But I'm afraid I'll regret selling a general zoom. Plus it's not worth as much as when I bought it. For those of you who own this zoom, do you still use it very much? I realize it's unfair to compare a zoom with a prime but I promise myself not to add a lens without selling one. What a dilemma...