or as nikon calls in, PC(perspective control). I rented the 45mm pc lens. I think I'm in love! I only had a few minutes to play around with it. I have to read up on how to use it a little more. Hopefully I can get out more tomorrow and play around with it. I plan on using it a little on saturday's engagement shoot. can't wait! Check out some of the images i captured today. nothing special.