a6000 Sony NEX macro tube for K mount Chinon
thingiverse
This is a simple macro tube adaptor for a 50mm f/1.7 CHINON manual lens. As I do not like using plastic parts close to the APS-C sensor, I use a cheap 49mm Macro Reverse Adapter Ring for Sony NEX E-Mount which fits inside the A6000. This piece is screwed inside a 3D printed interface into which is inserted a piece of 45mm pvc tubing. At the other extremity, there is another 3D printed part fitting the pentax K_mount I get in my CHINON lens see the video for further details. http://youtu.be/wo4cIPU84s8 This technique can easily be used to adapt any lens even for a non macro tube. It is easy to accurately calibrate the length in order to get a proper infinity focusing. Once calibrated, just glue the pvc in place !
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