I have an old Nikkormat FT2. I also have a few nicelenses from an old Ricoh Singlex TLS. The Ricoh lenses are M42 type screw on mount. I was looking at EBay and saw ADAPTER RING M42 - Nikon Bayonet Now, I have an adapter ring that lets me use M42 lenses on my Canon Rebel. However, they are not AF. Seems they would be a better match for the Nikkormat. Is the Nikkormat a "Bayonet Mount"? Do you think it would work?