Pentax PK to C-mount variable extension adapter
thingiverse
This is a DIY project I created to connect old PK camera lenses with a Chinese USB microscope camera featuring a C-mount thread. To complete this modification, you'll need to employ the "Amscope SM trinocular tube to C-mount adapter" found at https://www.thingiverse.com/thing:3563703/files in order to attach the PK adapter. The thread distance allows for infinite focus preservation and also enables the lens to function as a macro extender. You can further enhance this setup by adding a nut to lock down the distance.
With this file you will be able to print Pentax PK to C-mount variable extension adapter with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on Pentax PK to C-mount variable extension adapter.