This is a Praktina lens adapter with sony E mount.You can modify the design to adapt the lens to the cameras.support are recommended | Sony, Adapter, Sony e mount
Captain Jack's Praktina Accessories
Praktina mount adapter guide for MFT, Samsung-NX, Sony-NEX | Vintage Camera Lenses
Praktina FX Germany Professional Camera Outfit 3 Lenses Flash and Adapter | #1931044641
Praktina FX Lens to Canon EOSM Adapter wt close focus and back focus adjustments | eBay
adapter Canon EOS EF / PRAKTINA - 7511108601 - oficjalne archiwum Allegro
EXA Exakta mount adapter guide | Vintage Camera Lenses
Das Praktina-System
Free 3D file Praktina adapter・Model to download and 3D print・Cults
Used BPM Praktina female Bellows Interchangeable Mount