Actually, many of the C/Y lenses can be adapted to the Nikon bodies, including your 50/1.7 if it is an MMJ version. I haven't done that as I use my C/Y lenses on a Canon 1Ds body, which is more simple with a thin mount adapter. For your application have a look at Leitax dot com at the C/Y to Nikon folder. These mounts are well known and supported for several years. Some lenses cannot be adapted to the Leitax mounts, but many can and there is a list of those which have been successfully. Also, note that the adapted mount can be disassembled without damage and the lens and the mount can be sold separately. Regards,
Gary.