Macro lens adapters for F to SR-mount lenses

Fits Nikon F-mount bodies and Minolta SR-mount lenses.

Built in a jiffy for reasons of curiosity.

Watch this demo of the 80mm adapter with a 50mm F2 lens:
http://youtu.be/D8-BCeOGRiQ

Strictly a Nikon user? I've got a full set of Nikkor macro adapters over here: http://www.thingiverse.com/thing:621794