The original mounts were made in P-6 (Pentacon 6), Exakta 35mm, & M-42 mount. At a later point, there were some made in NIKON F mount. For the ultimate lens hacker, some were made for Hasselblad 2000/200 series, Hasselblad 1600/1000F, Bronica S/S2 and finally Pentax 67 MOUNT. The later lens hacker would require a machinist to fabricate a new solid mount and for the Bronica S/S2 machining the helicoid.