Hi everyone, still new to Pentax cameras and DSLRs in general, so I wanted to ask a question about the two lenses I bought. I acquired both the DA 18-55mm AL WR and the DA 50-200mm ED WR. The 18-55mm lens is incredibly fast, almost never hunts during autofocus, and is nearly silent when not autofocusing. The 50-200mm lens on the other hand is much more likely to hunt during autofocus (even at 50mm, it's slower to focus than the other lens at 55mm), plus the camera itself is noisier when the larger lens is in use (I'm guessing IS, right?). Is this sort of variation in performance normal for a different focal length lenses in the same series/this lens in general, or did I happen to get a dud lens? I don't want to hold onto a lens that is showing signs it might not last a good long time, but I also don't want to return a perfectly good one if that's the normal behavior, because it's also within my personal tolerance for lens performance.
Last edited by fullmental; 07-28-2015 at 09:39 AM.