Fujinon MK - FZ Mount Kit Install Guide


This kit converts the Fujinon MK 18-55mm and 50-135mm to a native Sony FZ Mount to be used with cameras such as the Sony F5 and F55. The Fujinon MK lenses do 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 four screws. 


You'll need a #0 phillips screw driver. To begin, simply remove the four screws located at the rear of the factory E-Mount.


This will allow you to remove the E-mount, exposing the factory shims which are semi-transparent plastic, not brass or steel. Do not disturb the factory shims.


Position the Duclos FZ mount so that the steel pin facing the camera and is in the 12 O'clock position on the lens.

 Install the four provided M1.7 screws by hand tightening or by using a torque setting of 0.4 Nm if applicable.

Make sure that you keep the original mount and screws in a safe place so that you can revert back to E-Mount in the future. Back focus can be adjusted if needed using the F.f adjustment knob on the lens. For more details on back focus procedure, click here. 


Duclos Lenses has developed this product with the support and approval of the Original Lens Manufacturer. Therefor, the factory warranty is FULLY maintained. However, as part of our agreement with the Original Lens Manufacturer, we ask that you process all warranty repairs through Duclos Lenses should the need arise. This allows us to monitor the results of our products as well as provide valuable feedback to the Original Lens Manufacturer. For additional questions, warranty or general service, please contact service@ducloslenses.com.


Duclos Lenses takes great pride in their product designs, almost all of which are designed in-house. Manufacturing takes place either in-house, or in the hands of our trusted specialists including a range of professionals in the field of opto-mechanical manufacturing and aerospace fabrication. Products that bear our name represent the highest quality in the motion picture lens industry.



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Duclos Lenses sets itself apart from the competition by actually knowing and understanding the products that we sell. We genuinely want all of our customers to receive the absolute best products possible. It's because of this that we offer two years of free basic maintenance with every new lens purchased from Duclos Lenses. Click here for more information.



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Duclos Lenses is committed to providing the best possible products to our customers. Unlike the competition, our technicians have the knowledge and tools to check every single lens that we offer. This happens once when new products arrive from the manufacture and once again before they ship out. This ensures that our customers are only receiving the best of the best. Yet another reason Duclos Lenses is the premier destination for motion picture lenses.