I am not familiar with the Crown Graphic, but I have used this adapter (fro Nikon F mount) with a Cambo. It works fine, but is not a substitute for a proper LF or MF digital back. Be aware that it puts the sensor way behind the back, so focusing at certain distances with certain lenses is limited. Using live view and magnification makes focusing easier. It has presets for positioning the adapter to make multiple exposures to stitch together. It is also useful if you need the LF camera movements, but you may lose lens coverage because of the added distance to the sensor. Be aware the whole rig with adapter, digital camera and LF camera body gets big and heavy.