M42 To EOS Adapter For DSLR Video May 21, 2013 by Caleb Pike — Since I’ve covered FD lenses and Nikkor lenses, I thought I’d continue covering various lens mounts and how to adapt them. Today we take a look at M42 lenses. This is the adapter I used, its really cheap ($6.30!) and works great! Fotodiox Black M42 Lens to Canon EOS DSLR Adapter. Quicktime File Recent Posts 7 Camera Tips for the Sony a6500 $33 Follow Focus Unit? Custom Monitor Mount Using GoPro Parts! 4K Vlogging Setup $600-700 4 Flexible LED Lights Under $200!