a6000 Sony NEX macro tube for K mount Chinon

thingiverse

This is a straightforward adapter ring for a 50mm f/1.7 CHINON manual lens. I prefer not to have plastic parts near the APS-C sensor, so I use a basic 49mm Macro Reverse Adapter Ring designed for Sony NEX E-Mount that fits snugly inside my A6000. This component is screwed into a 3D printed interface where a piece of 45mm pvc tubing is inserted. At the other end, there's another 3D printed part that matches the Pentax K mount on my CHINON lens. Check out the video for more details: http://youtu.be/wo4cIPU84s8 This technique can be easily applied to adapt any lens, even a non-macro tube. It's simple to calibrate the length accurately to achieve proper infinity focusing. Once calibrated, just seal the pvc in place with some glue.