The Hasselblad XPan Lens Adapter allows you to use XPan lenses with the X1D Camera. Although the XPan lenses have been discontinued they were available in the following focal lengths: 30mm f/5.6, 45mm f/4, and 90mm f/4. The slim line adapter only adds 21.4mm to the length of the lenses and weighs just 4 oz to maintain the lightweight design philosophy of the X1D camera system.