The TS-E 24mm f/3.5L II is one of four special
tilt shift lenses on Canon’s lineup. Made for architecture and product
photography, these instruments can render the focal plane out of the image
plane axis, distorting the lines to compensate for some perspective distortions
the photographer can’t always correct.
It’s not for everyday shots as it’s large,
heavy and manual focus only. But if you work with architecture and product
photography, it will definitely make a difference on your kit. Good
luck!
You can buy with confidence, the lens is in a great condition, almost not used.
PS. The sample picture (last one) I took without shifting or tilting, it was taken on the day I acquired the lens, then I've never used it ever since.