Title: Garbage - wait for Pentax
Product review: This is the worst camera lens I've ever had the misfortune to use.I wanted something I could travel with to replace my 18-55mm kit lens (I have a K100D) plus the 50-200mm telephoto zoom. These are great lenses but I was trying to hold down the bulk and weight, so I gave Sigma a try.Big mistake. This thing is TERRIBLE. Horrible chromatic distortion -- I frequently got BOTH purple and green fringing effects on opposite sides. Depending on the zoom and the angle I was shooting at, I got laughably distorted barrel and pincushioning -- sometimes in THE SAME SHOT. Literally, the extreme barrel distortion would flare back out at the corners. And it won't focus properly -- the center will be fairly crisp but the edges will be completely gone -- not the far edges either, but a mere third of the way across the frame. It vignettes really badly.This is a CRAPPY, CRAPPY lens. I've seen better on dollar trashcams in the thrift store.
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