Canon 8-15mm&Sony1.4xTC: extension ring for Nauticam zoomgear

[Architeuthis]

I have just finished and printed an extension ring for the Nauticam zoomgear for the Canon 8-15mm fisheye lens with Sony 1.4xTC to be used via adapter (Metabones V in my case) on Sony cameras (A7R5)...

After printing, I cut threads for three grub screws into the ring in order to fix it firmly to the Nauticam aluminium gear.

Canon815_2xSony.stl