Meyer-Optik Görlitz Diaplan 100mm f2.8

Projector lens with 3D-printed sleeve and M42-NEX Helicoid-adapter(17-31mm).

 

No Optics Were Harmed in the Making of this modification :).

 

Photo taken with Sony a7II & Vivitar Series1 28-90mm f2.8-3.5 VMC Macro Focusing

Done