I have a ragtag collection of Nikon F-mount to Leica M-mount, Nikon F-mount to Sony E-mount, and M-mount to E-mount adapters from Novoflex, Metabones, and MTF. None of these are inexpensive; all cost over $200, and one cost more than twice that. As has been discussed before, none are the correct length, almost certainly on… [Read More]