Canon-EF to Nikon-F conversion ring (EF-lens to F-camera)

thingiverse

This is a conversion you won't find purchasbly on the market due to several reasons: 1. You won't be able to control the aperture of the EF-Lens neither with your Nikon-camera nor manually on the fly.* 2. The flange focal distance of the Nikon F-mount won't allow you to focus to infinity even if the EF-lens is fitted directly to the camera. An additional conversion ring will make it even worse. So, why designing and printing it anyway? I had to equip a high-speed camera (guess the mount ;) ) with a fast tele-macro-lens for an experimental setup due to several reasons but only had a suitable (for our wallet) lens with an EF-mount. Since I wanted to use the optical setup at a small distance, the missing possibility to focus to infinity didn't concern me. And since there is a 3D-printer accessible, there would be different options to retro-fit an (fixed) aperture. DISCLAIMER Use the conversion ring wisely and on your own risk. I won't be responsible for any damage on your equipment. /DISCLAIMER The F-mount- side comes with a pit that engages in the locking mechanism of the camera. Lens-wise there is a preliminary hole to drill and tap a thread for a M2.5 stud screw that can lock the EF-lens. Possible design improvements (if time is available): -Narrow the F-wise locking pit -Add markings where the parts have to be attached I used the conversion ring made out of PLA on an analogue Nikon cam and on our high-speed cam and tested EF-lenses, an EF-S-lens and several other parts with an EF-moun (e.g. macro tubes). *except for some tricks like dismounting the dimmend EF-lens from a switched-on Canon-cam or additional (3d-printed) aparture equipment