Micro 4/3 to Pentax K Mount Adapter
By Tim Vrakas
Free
It's free to download
Technical
Printed From 1.75mm PLA on PrintrBot Simple Metal 2015 with E3Dv6 Hotend, Mic6 Heated Bed, Kapton Tape.
Use 40% infill, in Slicer apply MOD .STLs as 100% infill regions.
Use High-Opacity Filament, light colors will not block light, distort image (I used black).
Free