Tilt Shift Lenses?

Robin Casady wrote:

From the D800 manual:

Use the multi selector to adjust perspective (note that greater amounts of perspective control result in more of the edges being cropped out).

Software solutions, for perspective distortion, scale parts of the image and require cropping. So, you have to shoot wider than you want the final image and then crop the skewed edges. As a result, you lose resolution.