A friend rented a Nikon AF-S NIKKOR 20mm f/1.8G ED lens and I got to shoot a few frames through it with my D600. It’s very, very nice. It’s also a little expensive 😦
I put 3 raw files on DropBox at this link. These are 32 MB or so each and you need special software such as Lightroom or Photoshop to view the raw images.
Here’s the jpeg version of the photos. You can’t see how well this lens works from these.