FUJIFILM GX680 Professional Extended Wide Angle Bellows Wide Angle Bellows L (4 folds) The catalog states, "This wide-angle bellows is convenient for tilt and shift operations when using an extension rail." However, I have never used an extension rail, so I probably haven't used this either, and the details are unknown. (The box is crushed and dirty...) There are wrinkles from aging as it has been stored away, but I don't think there is any damage visible to the eye. The product is old. Please take a look at the images and consider purchasing with your understanding.