Tilt shift lenses are by far my favourite kind of lenses. Although they are manual lenses, they offer a huge degree of flexibility and some of the best image quality. There are occasions, however, when you may want to push these lenses to their respective limits by shifting right to the edge of the lens. Doing this, however, creates vignettes in the image and due to Tilt shift lenses not having correction profiles they can be quite tricky to remove in post.