Shift and Tilt
My Nikon 28mm f/4 PC lens has a shift feature but no tilt feature.
I was able to find a reasonably priced ($30 USD) Nikon F to Fuji X tilt adapter that allows me mount my 28mm f/4 Nikon PC lens on my Fuji X body. This adapter adds a tilt feature for control of depth-of-field using the Scheimpflug principle to a lens that already has a shift feature for perspective control.
Before the adapter, I primarily used this lens for architectural work and panoramic landscapes. With the added DOF control tilt feature, I should now also be able to use this lens for product shots and for landscapes where great depth-of-field between foreground and background is desired.
One big difference is that the adapted 28mm wide angle lens performs like a 42mm normal lens on my APS-C Fuji body.