Some Nikon lenses have software that corrects fisheye distortion. Sometimes you want to correct distortion, sometimes you don't. If that's important to you, let your software work with that lens. I don't, but it's not a big problem since I only use this lens when I need a little distortion. As with all my other Nikon gear, the quality is top notch. By the way, if you're really serious about this purchase, there are MANY sites on the internet with better lens reviews than this one.
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