Okay, so the kit 18mm-55mm / 3.5 lens on my canon digital reb is apparently kaput. Been noticing focus issues lately and yesterday realized during manual focus there's some play in the focus ring. Is this commonplace in kit lens. It's about a year or so old. I'm looking for a replacement for it. Comparable zoom, maybe a little faster. Any suggestions? I hoping i don't have to sell my first born to afford a new one but would like something with a little more speed and durability than the kit lens.