Revisions and updates on lens mounts. Updates include new L, LPL, Z, and R. What are the trends? Shorter Flange Focal Depth and wider inside diameter of mounts.   Mount Flange Focal Depth (FFD) Inside Diameter of Mount Nikon Z mount 16 mm 55 mm Fujifilm X-series 17.7 mm 43.5 mm Sony E-mount 18mm 46.1 mm Canon EOS M-Mount 18mm… read more…