I was dying to keep this lens. I've been shooting with Nikon for 25 years. I have top quality 1.4 lenses as well as 2.8 zooms. I shoot a lot with 14-24 2.8 and wanted to be wider because of the architecture. I ordered this and had to adjust the focus via the dock. Everything worked out, at least that's what I thought. When I fired at 6.3 to 12mm I noticed that the right side of the door frame had a bow. I thought I would fix it in LR CC but it didn't. He corrected everything else, like the vignette and corrected the distortion but didn't remove the bow. Now if you use this for landscapes you won't have any problems, but for critical lines it doesn't work for me. The lens is well built and as I said I was going to keep it but decided to return it. .I hope this helps if you're on the fence.
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