Zeiss/Nikon F - EF Mount Kit Installation Guide


This kit converts lenses with a native Nikon F mount such as the Zeiss ZF, ZF.2, Nikon Ai, AIS, and Voigtlander to a fixed Canon EF Mount to be used with EF Mount cameras. This mount kit does not offer any electronic feedback. This mount is considered "passive" in that there is no communication between the lens and camera. The conversion process is entirely NON-destructive and is fully reversible at any time. Installation requires basic mechanical aptitude and only involves a few screws. Some steps may vary depending on the specific lens you're converting. Our mount kits are designed and manufactured with very high tolerances in order to maintain accurate flange focal distance. However, it's worth noting, as is the case with any precision optical tool, the flange distance should be adjusted within 0.0005" (12 microns) in order to ensure accurate infinity focus.

Kit Includes: Flange, Plate, 3x M2 screws, 6x M1.7 screws
Tools Needed: #0 and #00 phillips JIS screw driver
Time Required: Approximately 10-20 minutes


We'll use a Zeiss ZF.2 Classic for an example in this guide. However, the process will be similar for most F mount lenses. Start by removing the three phillips head screws from the Nikon F mount. There may be a fourth on some lenses, but this screw can remain in place.

Zeiss/Nikon F-EF Mount Conversion Kit


Once you've removed the these three screws, align the Plate with the holes and install the three M2 screws provided in the kit. Hand tighten (0.4 Nm recommended). We recommend using a thread locker on the screw threads to ensure the screws are well fastened.


Zeiss/Nikon F-EF Mount Conversion Kit
Zeiss/Nikon F-EF Mount Conversion Kit

Alignment of the Flange is simple. The "Duclos Lenses" engraving should be at the 12 o'clock position if looking at the mount from the rear of the lens. Once aligned, install the six M1.7 screws provided in the kit. Hand tighten (0.4 Nm recommended). Once again, thread locker is recommended to ensure the screws are secure.

Zeiss/Nikon F-EF Mount Conversion Kit
Zeiss/Nikon F-EF Mount Kit


Duclos Lenses is not responsible for any damage caused during disassembly, installation, or reassembly. Mount installation and calibration is offered free of charge for all mounts purchased from Duclos Lenses. If you're not comfortable performing DIY mount installation, we're happy to help you. Don't hesitate to reach out to us via email, webchat, or phone anytime.